Yesterday was the spookiest day of the year, and whether our readers were out trick-or-treating or staying at home to watch the pilot episode of Ash vs. Evil Dead, we hope you enjoyed your Halloween. Over on the Screen Rant Twitter page we were keeping people entertained by captioning Halloween costumes with fake headlines (no doubt confusing a lot of people in the process), and we also shared some cool facts about some of the scariest horror movies around.

For those of a nerdy persuasion, there was plenty to enjoy on social media as celebrities put on their Halloween costumes to celebrate the holiday. From Ariana Grande dressing up as a cow to Justin Bieber donning basketball shorts to become Will Ferrell’s character from the 2008 comedy Semi-Pro (yes, that was quite an obscure one) there were plenty of interesting outfits to see, but we were particularly interested in those of a geeky persuasion.

Continuing his enthusiastic social media campaign to support upcoming R rated X-Men tie-in Deadpool, Ryan Reynolds dressed up as (naturally) Deadpool and went trick-or-treating with some kids dressed up as members of the X-Men team and the Brotherhood of Mutants. Of course, this wasn’t just any store-bought Deadpool costume; this was one of the costumes that were used in the making of the movie, which Reynolds took with him as a souvenir after filming was complete. The photo was accompanied by the caption, “Dear Fox, stop changing the timelines. It’s confusing the audience.”

Ryan Reynolds dressed as Deadpool for Halloween The Best Nerdy Celebrity Halloween Costumes of 2015

The biggest upcoming release of the year is Star Wars: The Force Awakens, so How I Met Your Mother star Neil Patrick Harris shared a photo of his family enjoying a throwback to the days of classic Star Wars. Harris donned a robe and beard to become Obi-Wan Kenobi, his husband David Burtka dressed up as Han Solo, and kids Harper and Gideon were transformed into Princess Leia and Luke Skywalker, respectively.

A long time ago in a Halloween far, far away....

A photo posted by Neil Patrick Harris (@nph) on

A week before Halloween, Arrow fans were treated to the sight of Emily Bett Rickards (Felicity Smoak) and Colton Haynes (Roy Harper) dressed as Sailor Moon and Ursula the Sea Witch from The Little Mermaid. Rickards’ costume is pretty cool, but Haynes takes the top prize for spending the night in elaborate prosthetic make-up that included jowls and a fake bosom. He also shared the moment in which the costume came off, though we warn readers that it’s somewhat NSFW.

Heading out with my love @emilybett

A photo posted by Colton Haynes (@coltonlhaynes) on

Members of the Suicide Squad put aside their differences for the evening and attended a party organized by the Joker (Jared Leto). Here’s Adewale Akinnuoye-Agbaje (Killer Croc) and Jay Hernandez (El Diablo) in their Halloween outfits.

Jared Thx for a funky Halloween party! @jaredleto @jayhernandez @suicidesquadmovie #halloween

A photo posted by Adewale Akinnuoye Agbaje (@therealadewale) on

Agents of S.H.I.E.L.D. actress Chloe Bennet (Daisy Johnson/Skye) gets points for thinking outside the box as she went to a Halloween party (along with Rickards and Haynes) dressed as… groceries. She also dressed her dog up as Chewbacca.

A photo posted by Chloe Bennet (@chloebennet) on

#chewbacca

A photo posted by Chloe Bennet (@chloebennet) on

On the other end of the spectrum, The Flash star Grant Gustin gets precisely zero points for creativity with this Halloween outfit, though the caption suggests that this may actually be something that he’ll be wearing in the show. Let’s hope so. His dog Nora was also dressed up as the Flash, but she doesn’t look too happy about it.

Got to shoot a one on one scene with @cavanaghtom today for the first time in a while. Called for a photo.

A photo posted by Grant Gustin (@grantgust) on

Staying within The CW’s DC universe, we now know where Ronnie Raymond, the former other half of superhero Firestorm, ended up when he closed the portal over Central City. Apparently he went through a wormhole to an alternate universe where he’s a member of the Power Rangers.

A photo posted by Robbie Amell (@robbieamell) on

And finally, one of the hardest working celebrities around – Screen Rant news editor Sandy Schaefer – transformed into Star Wars: The Force Awakens villain Captain Phasma for the evening. Really, he should wear this to work every day.

Sandy Schaefer as Captain Phasma The Best Nerdy Celebrity Halloween Costumes of 2015

HAPPY HALLOWEEN!

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