When one thinks of top-of-the-line sitcoms, it is impossible for them not to include That 70's Show. This was a fantastic coming of age comedy that did a marvelous job portraying the decade its title alludes to. Its main cast would all go on to build immensely strong careers for themselves because of it. This is entirely justifiable though, as they were nothing short but stellar.

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Yet, for a show to truly blossom, it needs to do a solid job of casting guest stars. This is another marvelous component of this show's history, as it would go on to have a plethora of amazing choices. However, with this show not being off the air for almost 15 years, it is natural that many viewers probably forgot a lot of them. Here are some of the best.

Dwayne "The Rock" Johnson

Dwayne "The Rock" Johnson

Dwayne Johnson is an absolute megastar, both in film and the WWE. However, what many people may not remember is that he actually was in a That 70's Show episode. He portrayed his late father, Rocky Johnson, as a professional wrestler.

Johnson did a solid job in this role, even if it was a very small cameo. However, in his short time on screen, he definitely showed that he is a very talented actor.

Betty White

Betty White as Kitty's mother on That 70s Show

This series did an absolutely marvelous job bringing giving the role of Bea to Betty White. She was very hilarious as this character of course. This should not come as a surprise to anyone, as she has always been throughout her illustrious career.

Interestingly, unlike her sweet real self, White's character was immensely rude and downright cruel. She continuously put down Kitty and her husband, Burt. However, even with her character being so mean, it is absolutely essential to pay respect to how well White portrayed her.

Joseph Gordon-Levitt

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During the beginning stages of That 70's Show, they landed a pretty big guest star in Joseph Gordon-Levitt. His role as Buddy was pretty big, as he and Eric would befriend one another as chemistry lab partners. They even have a hilarious friendship montage.

RELATED: 10 Behind The Scenes Facts About The Cast Of That 70s Show

However, things would escalate too far, as it turned out that Buddy developed feelings for Eric and kissed him in his car. Although Eric of course had feelings for Donna, this was an important occurrence, as Buddy would go on to explain why she would like him. Thus, it helped Eric see his value more.

The Sprouse Twins

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Cole and Dylan Sprouse have been able to build themselves some marvelous careers, especially due to their The Suite Life of Zach and Cody days. However, it is also important to remember that they had some pretty big guest roles when they were even younger, including on That 70's Show.

Although they only had two scenes on the show, they were absolutely hilarious in them. Naturally, they would go on to relentlessly bully Kelso in both of them. First, they would go on to copy him, while then spitting in his ice cream cone whilst in the car with him. Overall, it may have been short, but still quite funny.

Yvette Nicole Brown

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Yvette Nicole Brown is mostly known for her outstanding role as Shirley on Community. Yet, even with his immense level of popularity, many people may not even realize that she guest-starred on That 70's Show as well.

She would go on to play Sgt. Davis. In this episode, Fez, Hyde and Randy were in jail for speeding, which naturally led to them interacting with her. Overall, she played this role very nicely, as she was not only tough but was very funny in the process.

Lindsay Lohan

Lindsay Lohan

It shouldn't be too surprising that Lindsay Lohan guest-starred on an episode, as she was extremely popular during this show's run.

RELATED: That '70s Show: 5 Worst Things Eric Did To Hyde (& 5 Hyde Did To Eric)

She played Danielle, who would end up developing quite the crush on Fez. However, Kelso also had one on her too, so they began fighting over her. Overall, her role in this show was not necessarily that big, but she did well with what she was given for sure.

Jenna Fischer

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Known for her iconic stint as Pam from The Office, Jenna Fischer has been able to formulate a spectacular career. Yet, even the biggest of fans may forget that she actually played a very tiny role for That 70's Show. In fact, her screentime was sadly rather limited.

She would play a jewelry store worker. In her best scene, Jackie with Fez return Donna's wedding ring, as Eric of course bailed on their ceremony. She was quite the opposite of Pam in this scene, as she was a bit condescending and passive about it. Yet, it was hilarious that she thought Jackie was Donna.

Justin Long

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Justin Long always does a marvelous job guest starring on shows, as evidenced by his run on this series. He would go on to play Fez's cousin, but he possessed a British accent. This of course was vastly different than Fez's, which made him funny from the start.

Long did not have much screen time during his lone episode, but he certainly left enough of an impact. Viewers found him quite hilarious, especially when the gang asked him and Fez where they are from. Overall, he added a lot of debate to that ongoing unanswered question.

Alyson Hannigan

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Known for her stellar run as Lily on How I Met Your Mother, Alyson Hannigan may have upped her value as an actor guest-starring here. This is due to the fact that in her short stint, she was nothing short of perfect in terms of comedy.

Playing a police cadet named Suzy in the series, she was one of the many girls who liked Kelso, while also being Fez' crush. Naturally, this would lead to an array of issues between the two friends, as Fez would grow jealous of Kelso. This would eventually drive her to not want to date either one of them.

Jessica Simpson

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Jessica Simpson would end up being a spectacular guest star for this show, as she was given the role of Annette. This character was immensely naïve, as she fell head over heels for Kelso, which of course was never a good occurrence for anyone.

However, her constantly rejecting Kelso's primary goal with her was hysterical, as this was quite the rarity for him. She may not have been the smartest of characters, but she definitely was a fun fit for the series, even if it was a short time.

NEXT: That 70s Show: 10 Changes The Show Made After The Pilot Episode