It didn't take long for Harley Quinn to become one of Batman's most mainstream villains. Ever since her very first appearance ever in the critically acclaimed Batman: The Animated Series 1992 episode, "The Joker's Favor", she was a fan favorite. It propelled her into multiple comic threads, a major role on the series, and into movies.

It wasn't just this psychotic criminal's wacky sense of humor or her incredibly unhealthy relationship with The Joker that made fans adore her, it was also the bond that she shared with another one of Batman's most famous foes.

Harley Quinn and Poison Ivy have one of the most engaging, complex, and explored relationships in Batman history. They were first seen as great friends, even though there was a bit of tension wherever The Joker was concerned. Innuendo began to fly soon after and the creators had no choice but to explore every possibility of their relationship. This has led to an assortment of complicated scenarios between the two women, The Joker, and even Batman and Catwoman.

Their relationship was delved into more deeply when the two got their own shared comics as well as in the Gotham City Sirens series. We've seen different incarnations of their relationship in video games as well. What's consistent about each canon is that these two seem like a bit of a mismatch due to their very different personalities, interests, and levels of criminal activity, but they keep getting drawn back together.

Without further ado, here are 20 Crazy Revelations About Harley Quinn and Poison Ivy's Relationship .

They Were In A "Romantic Non-Monogamous Relationship"

Fans got the official confirmation of the true nature of Poison Ivy and Harley Quinn's relationship in 2015 from the DC Comics Twitter page.

Although everyone and their dog knew that Harley and Ivy's friendship was far deeper and more romantic than what was explored on the page or the screen, they got the official word that these two are "Girlfriends without the jealousy of monogamy".

Before this, fans could only fully explore their full relationship in their minds. They constantly were shown both highly flirtatious and emotionally supportive moments, but Harley was always shown to have romantic feelings for The Joker and no one else. Now, that's simply no longer accurate.

They Met On Batman: The Animated Series

The first time Poison Ivy and Harley Quinn met was in the highly acclaimed episode of Batman: The Animated Series, "Harley and Ivy". The two ran into each other when they were both trying to rob the same museum, for different reasons, at the exact same time.

They are almost captured by the police so they are forced to jump in the same car together and speed off to Ivy's lair.

During this time, Harley has had a big falling out with The Joker, so she's forced to stay with Ivy and the two develop a relationship, although most of it revolves around thievery.

Things change drastically when The Joker finds out about this relationship and attempts to take Harley back under his own wing. He just couldn't handle that she was being successful in crime without him.

Ivy Saved Harley From The Joker

Poison Ivy has saved Harley Quinn from The Joker both physically and symbolically in many instances.

Most famously, Ivy saved Harley after she had been brutally left on the brink of life by her abuser, The Joker.

Ivy nursed Harley back to health and gave her a toxin immunizer. This isn't dissimilar to how the pair were first introduced in Batman: The Animated Series. There, Harley is expelled from Joker's gang and forced to find a home elsewhere. Ivy takes her in and ends up giving her the same toxin immunizer.

The fact that Ivy saved Harley from The Joker symbolically is perhaps just as important. Ivy showed Harley what it's like to take control of one's own life and not live in the shadow of someone who treats her so poorly. Ivy is Harley's rock and her greatest mentor.

They Took Bruce Wayne On A Shopping Spree

In an episode of the 1990s classic, Batman: The Animated Series, the villainous pair decided that they would make Bruce Wayne their slave. The episode was called "Holiday Knights", which was appropriate since it was set at Christmas time.

Ivy and Harley surprised Bruce in his limo and doused him with a mind-control toxin.

The toxin was one of Ivy's creations that ended up making Bruce obey their every single command. Of course, the main goal of the pair was to make the billionaire bachelor purchase absolutely everything they set their eyes on.

Though it wasn't regarded as much of a success as the first time Ivy and Harley were paired-up on the show, it certainly sparked more storylines that the two shared.

They Are part of the Gotham City Sirens

In 2009, a comic series called Gotham City Sirens was launched. It saw Harley and Ivy team up with Catwoman. The three iconic Batman villains went on various adventures together and sort of ended up being anti-heroes of sorts.

Catwoman was more or less the moral center of the team. In fact, she saw something good in both of the others and attempted to reform them. She even tried to convince Batman to leave them alone since there was a level of trust between them.

However, this three-way friendship ended when Harley betrayed them all for her The Joker, who had a sick hold over her. Ivy confronted Harley, who revealed that she knew that Ivy had romantic feelings for her. This caused a big fight between them. Soon after, Catwoman arranged for both Harley and Ivy to be captured.

They Became Singers for record producer Lex Luthor

Outside of the canon of the comics and the TV series is the DC imprint Elseworlds. They offer completely alternative takes on the characters we've come to love.

In one particular issue, Elseworlds: 80 Page Giant, "Rockumentary", Harley and Ivy are portrayed as a folk music duo working for a record producer by the name of Lex Luthor... Yes, that Lex Luthor.

The comic was not successful. It was withdrawn and destroyed after only 2000 copies were distributed throughout the UK.

Although interesting new takes on these two are always appreciated, it's clear that making the two folk singers instead of criminal masterminds is not the right move.

Harley Betrayed Ivy For The Joker

In the iconic ending of the Gotham City Sirens comic series, Harley betrays both Catwoman and Poison Ivy for The Joker. Her original intention was actually to assassinate The Joker in Arkham Asylum. That plan fell through when she confronted the downright evil man she desperately loves.

Ivy followed Harley to Arkham and tried to end The Joker herself. Harley turns on her best friend and potential lover in order to save The Clown Prince Of Crime's life.

In order to distract Ivy, Harley revealed that she knew that Ivy had romantic feelings for her. This moment caused Ivy to be taken aback, allowing Harley to attack her and escape with The Joker.

They Kissed Under The Moonlight

Though a great deal of the moments shared between Harley and Ivy have been laced with more adult themes, the two have also shared romantic moments. Ever since they were first paired-up, fans have wanted these two to explore a relationship.

Amongst the many beautiful and romantic moments shared between them is a specific kiss under the moonlight.

This kind-of cliche scene from the comics had everything a moment of this nature should have.

It had the night's sky, the glow of a street lamp, a sprinkle of white snow, and Poison Ivy's vines entangling them both. If only it was enough to fully convince Harley that she never needed the Joker again.

Batgirl Asked If They Were A Couple

In Phil Dini and Rick Burchett's comic, Batgirl Adventures, a tie-in to the revamping of Batman: The Animated Series, the question of Harley and Ivy's romantic relationship came up.

Harley is forced to work with Batgirl to free Ivy from Kitsune, who has kidnapped Ivy in hopes to get her hands on the plant toxins she has.

When Batgirl and Harley are watching the interrogation up in the rafters, Batgirl starts to poke around at the true nature of their relationship.

She sees Harley's intense worry for Ivy and asks if they are more than friends.

Harley then insinuates that Batgirl and Supergirl are said to have the same sort of relationship.

Getting slightly insulted, Batgirl drops it and things carry forward.

Ivy Made Harley Immune To Toxins

After being brutally assaulted by her abusive lover, The Joker, Harley Quinn was on the brink of life. She was saved by Poison Ivy, who almost immediately forced a liquid concoction down Harley's throat. Little did Harley know, this elixir would actually change her life.

What Ivy force-fed Harley was actually a type of immunizer.

It allowed her to be around Poison Ivy, as well as to get physically close to her, without any of the nasty side-effects.

This natural compound also allowed her to become impervious to Joker's laughing gas and practically any other toxin around. Additionally, it heightened her strength and agility. In short, Ivy not only saved Harley's life but made her stronger than ever before.

They were roommmates With The Riddler

In the first issue of Gotham City Sirens titled "Union", Harley Quinn and Poison Ivy hide out in Edward Nygma's townhouse after they incapacitate him.

Nygma, AKA The Riddler, was using this space as his official hideout, but little did he know that these two villains would take it for themselves.

Poison Ivy ends up saving Catwoman's life and bringing her back to the hideout. Soon after, the three become a team in order to protect one another.

At first, the only thing that gets in the way of these three is Ivy and Harley's desire for Catwoman to reveal the true identity of Batman.

After they get over this minor roadblock, the trio set off on a series of adventures together while using Riddler's hideout as a home base.

Harley Convinced Ivy Not To Destroy Batman

Though Harley Quinn has constantly been in conflict with Batman, it usually has to do with The Joker or her own criminal activities. Unlike her abusive lover, she doesn't have quite the hate for the masked vigilante. In fact, in the iconic Mad Love storyline, she manages to capture and almost end Batman but makes it clear that she's only doing so for The Joker.

Poison Ivy, on the other hand, has a larger contempt for Batman. In most instances, she seems to have no qualms about ending his life. In one instance, Harley actually intervenes when Ivy has the upper hand over The Dark Knight.

It's unclear whether or not she did this more for Batman or more to save Ivy from the repercussions.

Harley Saved Ivy From A Corrupt Police Officer

In the issue of Gotham City Sirens entitled "Songs of the Sirens", Poison Ivy is framed for a series of hideous crimes and is kidnapped by a renegade cop.

This police officer harms Ivy in many ways, including leaving her in a hole without food.

With the help of Gordon, Harley and Catwoman track Ivy down. When they find her, she's on the cusp of life. The only way they are able to revive her is by submerging her in water.

Soon after, the trio is forced to enlist the help of The Riddler in order to track down the real criminal who is now framing all three of them.

They Got Married in Vegas

In the latest issue of the prequel comics for the video game Injustice 2, it was revealed that Harley Quinn and Pamela Lilian Isley actually got married within that canon.

Poison Ivy mentions that there was an Elvis impersonator at their elopement in Vegas.

This is the first time that these two Batman villains have ever been depicted as a married couple since they were first brought together in Batman: The Animated Series in the 1990s.

Fans have long been trying to get these two together. Through the years, they have been seen as a couple in a loving relationship by fans.

This is a major step in their depiction. Now it's completely possible to explore their connection more deeply in other mediums.

They Battled Supergirl Together

In both the TV show and comic, Harley Quinn and Poison Ivy face another iconic DC duo, Batgirl and Supergirl. This may seem like an unfair match given that Supergirl is one of the most powerful characters in the DC universe. However, in the comics, Harley did manage to strike her pretty hard with a giant mallet. Unfortunately for Harley, Supergirl managed to ensnare Harley in her own weapon.

Poison Ivy didn't fare much better against the Kryptonian.

When Ivy tried to kiss her with her poisonous lips, Supergirl managed to knock her into oblivion.

A similar situation happens in the TV show, when Harley and Ivy even had the help of Livewire, but were still no match for Batgirl and her powerful flying friend.

Ivy and Catwoman Saved Ivy From Hush

Unless fans are well-acquainted with the comic books, chances are they unaware of Hush.

Tommy Elliot, the man behind the bandaged face of Hush, was a childhood friend of Bruce Wayne's. Tommy grew up hating both his parents and resented the Wayne family for saving their lives after a car crash.

In one issue of Gotham City Sirens, Harley Quinn is captured by Hush, who has reconstructed his face to look like Bruce Wayne in order to seize control of Wayne Enterprises. The severely deranged Hush plans on eliminating Harley.

Luckily for her, her new teammates, Poison Ivy and Catwoman, track her down and are able to sneak her out from the clutches of Hush.

Ivy Wants Harley To Realize Her Potential

One of the most consistent things about the relationship between Harley and Ivy in both the comics and television shows is that Ivy wants Harley to realize her full potential.

Poison Ivy is almost always shown to be a woman who has all the strength she needs without the influence of a man - or anyone else, for that matter. She always has a very clear-cut goal, usually connected to her love of the planet and her desire to protect it from harm.

Harley, on the other hand, is a bit of a loose cannon. It's one of the things fans love about her. Both her actions and her dialogue feel off-the-cuff and fun. The only thing that remains somewhat consistent is that she has an unhealthy romantic relationship with The Joker, who she just worships.

Ivy's goal, in terms of Harley, is usually to get her to realize that she can do so much more than she's been told her whole life.

They've Often Shared Very Intimate Scenes

Without a doubt, the vast majority of the writers of both the Batman comics and the television shows are hetero men. These writers have villains put Harley and Ivy into so many suggestive scenes together. Showering together, scantily-clad sleepovers, and undressing in front of one another are just a few of the many moments that have alluded to a relationship between them.

Over the years, these rather obvious moments have been explored by a more diverse selection of writers who have further developed their relationship.

In fact, they added a level of romance and intrigue. They've made these two women have a push-and-pull that have made fans of all ages, genders, and orientations want them to break the tension and be together.

Harley And Batgirl Saved Ivy

During the revamp of the highly successful, critically acclaimed Batman: The Animated Series, Phil Dini, and Rick Burchett created a tie-in comic called Batgirl Adventures.

In it, Harley Quinn bargains her freedom in order to get Batgirl to help save Poison Ivy from the villain Kitsune, who aims to either convert Ivy to her cause or get her to hand over the laptop with the formulas for her plant toxins.

Batgirl ends up fighting off Kitsune's gang while Harley frees Ivy. After the chaos, Harley agrees to keep her end of the bargain.

Batgirl takes Harley into the police headquarters only to find out that Harley has been paroled previously so she's free to go. Ivy and Harley then drive off together.

Their First Comic Together Was Batman Adventures #12

After a successful debut on Batman: The Animated Series, the duo arrived on the comic book scene a few months later in Batman Adventures #12. This particular comic series was a direct tie-in to the T.V. show and didn't exist within the mainstream comic canon.

This particular issue also served as the first comic to ever feature Harley Quinn, who was, of course, a creation of the TV series. The story involved the pair coming into conflict with Batgirl.

Although it was successful, the pair didn't get team-up again until later on in the TV series in an episode called "Holiday Knights".

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What is your favorite thing about Harley and Ivy's relationship? let us know in the comments below!