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These Actors Were Way Too Old to Go Back to High School!

1 of 18

Movie age: 17, Real age: 30. Well, isn't this guy just a regular Cory Montieth? While he was running around downtown Chicago, acting as if he was experiencing an art museum for the first time in his life, he was actually old enough to drink and only five years away from being able to run for President. [Photo credit: Paramount Pictures]

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Photo: Paramount Pictures

2 of 18

TV age: 18, Real age: 30. Holy crap. Finn Hudson is 30?! He may be dopey and lovable on TV, but in real life, Montieth is at the age when parents start asking why he's not married yet instead of convincing him not to give up on his dreams. [Photo credit: Fox]

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Photo: FOX

3 of 18

TV age: 17, Real age: 26. When Annie Edison first stepped foot on Greendale campus, she was a mere 17 years old. But in the real world, Alison Brie was far beyond her awkward (hopefully not aderrall-dependent) high school years. Clearly, that's not a problem, because Annie was and still is delivered perfectly each episode. [Photo credit: NBC]

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Photo: NBC

4 of 18

Movie age: 16, Real age: 25. Lohman will probably be grateful for her youthful appearance when she's older, but in the meantime, it's a little shocking. And 'Flicka' isn't the first instance. She also played a 15-year-old in 'White Oleander' when she was 20. [Photo credit: 20th Century Fox]

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Photo: 20th Century Fox Home Entertainment

5 of 18

Movie age: 17, Actual age: 29. Yes, Michael J. Fox has always been blessed with a youthful face and probably could have pulled off a college coed in his 'Spin City' days, but come on. That difference is nuts. At 17, you're saving up for a secret subscription to Penthouse and at 30 you're saving up for an actual house. [Photo Credit: Universal Pictures]

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Photo: Universal Pictures

6 of 18

Movie Age: 17, Real Age: 25. It may not seem like that big of a deal, but when you consider how much your life changes between 17 and 25, the difference suddenly becomes terrifying. [Photo Credit: Columbia Pictures]

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Photo: Columbia

7 of 18

Movie age: 16, TV age: 17, Real age: 27, 31. This lucky, lucky woman. She got to live the dream for a few sweet years: she got to be 17 again and again and again. [Photo credit: Paramount Pictures]

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Photo: Paramount Pictures

8 of 18

TV ages: 17 (forever, but actually somewhere in the 100s) and 18, Real age: 30 and 27. Paul Wesley gets a pass because his character is actually a vampire from the 1800s, but Zach's Matt is not only young, but he's wildly naive too. [Photo credit: CW]

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Photo: CBS Broadcasting Inc.

9 of 18

TV ages: 17-18, Real ages: 32 (Steger), 29 (Lanter), 33 (Donavan). Being at or over 30 is a strange age to be stuck in high school, day after day, for a long term role. But that's just what these dudes are doing. Well, except for Donovan, who left the show. We're not sure why, but it might have something to do with 33 being the cut off for playing a high schooler. [Photo credit: CW]

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Photo: CBS Broadcasting Inc.

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Movie age: 17, Real age: 29. Suddenly, all his sophomoric behavior doesn't seem so funny any more. [Photo credit: Miramax]

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Photo: Miramax

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Movie age: 17, Real age: 25. You know, it's not that Judge wasn't great in 'Fast Times,' but I can't be the only one who always thought he looked a little old to be in this movie. It all makes sense now. [Photo credit: Universal]

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Photo: Universal Pictures

12 of 18

TV age: 18, Real age: 29. Well, how else did you think the Fonz got to be so cool? He had the one thing no one else had: experience (and lots and lots of it). [Photo Credit: ABC]

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Photo: ABC Television Network

13 of 18

Movie age: 17, Real age: 25. Parker Posey is another one who seemed more like an out of touch twentysomething than a spastic senior in high school. Finding out she was actually 25 isn't too surprising. Plus, it truly lent an extra layer of immaturity to her delusional high schooler. [Photo credit: Gramercy Pictures]

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Photo:

14 of 18

Movie age: 18, Real age: 26. Cool your jets, everyone who was over the age of 25 when they first saw this movie. It's not that weird that you thought Ms. Elizabeth was a babe when you saw this movie. She was actually far older than her character. [Photo credit: Universal]

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Photo: Universal Pictures

15 of 18

TV ages: 17, Real ages: 26 and 28. This was the show that started this whole conversation. Aaron Spelling's prime time soap was one of the first to be publicly ridiculed for having twentysomethings running around pretending to be wrought with high school problems. Thanks a lot, guys. This is why I never thought I was actually old enough to be in high school. [Photo credit: Fox]

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Photo: FOX

16 of 18

TV age: 16, Real age: 27. When Charisma first debuted Cordelia on 'Buffy' she was well over the age of her character. That didn't seem to bother her though, because she kept the age difference up as she moved Cordelia over to Angel's world on, well, 'Angel.' [Photo credit: WB]

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Photo: WB

17 of 18

TV age: 18, Real age: 30. No. Way. While Lane was busy fighting her mom's every whim, she was actually a full grown adult? Give this girl an Emmy, I don't care if it's too late! [Photo credit: WB]

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Photo: WB

18 of 18

Movie age: 17, Real age: 34. Ah. It all makes sense now. Everyone in 'Grease' looked older than they should, but Stockard Channing took the cake. She looked like she could be a high school kid's mom, and that's because she really almost could have been. [Photo credit: Paramount]

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Photo: Paramount Pictures

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These Actors Were Way Too Old to Go Back to High School!

Alan Ruck in 'Ferris Bueller's Day Off'

Cory Montieth on 'Glee'

Alison Brie in Season 1 of 'Community'

Alison Lohman in 'Flicka'

Michael J. Fox in 'Back to the Future II'

James Franco in '21 Jump Street'

Stacy Dash in 'Clueless' (Movie and TV)

Paul Wesley and Zach Roerig on 'The Vampire Diaries'

Michael Steger, Matt Lanter, and Trevor Donavan on '90210'

Matthew Lillard in 'She's All That'

Judge Reinhold in 'Fast Times at Ridgemont High'

Henry Winkler on 'Happy Days'

Parker Posey in 'Dazed and Confused'

Shannon Elizabeth in 'American Pie'

Ian Ziering and Gabrielle Carteris in 'Beverly Hills: 90210'

Charisma Carpenter in 'Buffy: The Vampire Slayer'

Keiko Agena on 'Gilmore Girls'

Stockard Channing in 'Grease'

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