I think she was 26 at the time of filming. She didn't look like a 18 year old but she could pass for early 20's. I just turned 33 but I get early 20's a lot from people.

I would like to make two observation. First, her body definitely doesn't look like an 18 year old, that's for sure!! Her body is too matured and developed, and complete with a little cottage cheese(cellulite)on her legs. Which was evident during the bathing suit scene. Go back and see for yourself. Secondly, I'm astounded by how her body looks for the 80's. I think her body is a head of it's time. That body would hold up even in the 21st century, only because people of today are more work out conscious. It appeared that she did some sort of weight training or cross-fit training. Let's not forget working-out and cross-fit training certainly wasn't mainstream in the 80's. Furthermore, woman's bodies back in the 80's were more buxom and voluptuous. That's just my opinion because I was in my sexual prime in the 80's. Her body to me looks more harder and leaner, except for those few dimples on her buttocks(lol). Do you agree or disagree?

wow, she looks fully developed for sure but wouldnt peg her for 28

Both Sherylin and Zabka were only 20 though.
It was tough to believe Rick Morehouse(Clayton Rohner)was in High schoolwith that 5 O'clock shadow coming in at noon! Of course he was 28 at well.

I am 28 and people constantly think I am still 17/18, lol. I have been getting it for years now so am used to it. When I was 18, someone thought I was 12. Last year, someone thought I was 14.

Good point.the guy was freaking balding in high school for goodness sakes.
Not to mention Terry's boyfriend Kevin, who was supposed to be a college yuppie, was 30.
Arye Gross who played nerdball Willie, was 25.

I'm suprised no one mentioned that the guy who played Rick was 28 as well.

Agree
This was
very
common in the 80's teenie movies, and hell even today, to have actors in the early-mid 20's portraying teens. The majority of the Breakfast Club was in their mid-20's.
In fact other than several movies with the Coreys (License to Drive, Lost Boys), I can't really think of any teenie movies of the 80's, where teenagers actually
were
teens.
And probably the worst offender was Grease:
Olivia Newton-John (Sandy) was 30.
Jeff Conaway (Kenickie) was 28.
Didi Conn (Frenchie) was 27.
Annette Charles (Cha Cha) was 30.
Stockard Channing (Rizzo) was 34!!!
Ironically, at 24 years old, John Travolta was one of the
youngest
of the Ridell High Schoolers, other than Dinah Manoff (Marty Maraschino) who was 20.

She was 28 in 1985, which means she was 8 in 1965, meaning: she's a year older than Susan Cowsill. Interesting.
What you see is not necessarily what you get,
Not trying is dying, keep trying unto death.

What's wrong with that?

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She had a young face yeah, but that scene in the bikini you can tell she's a woman and not a kid. Absolutely fantastic body.

Leigh McCloskey (Kevin) was 30, and supposedly playing a college aged guy and he was believable.
I thought he was FAR from believable as a college guy, unless he was in his 10th year of Med school.

I don't think "Kevin" was believable AT ALL. Terry definitely looked younger than 28, but I didn't buy Kevin as a college guy for a second.

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She had some nice f'n tits!

Leigh McCloskey (Kevin) was 30, and supposedly playing a college aged guy and he was believable. But yes, Joyce looked way younger than 28. Deborah was 27, as well and passed for a teen as well. I am just wondering now if older actors could get away with playing teens. It seems like our culture just doesn't allow for it anymore.

Fav boob scene in the 80's

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she couldve shown her boobs even at age 18 heck even younger, IIRC thora birch was 17 when she shot american beauty.

Thank goodness for that!

Of course she had to be a bit older so they would be able to show her boobs.

I didn't realize she was 28 when the movie was filmed. I've seent he movie 10 or 15 times now and never suspected she was so much older than the character she played.