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What's your 'get off my lawn' entertainment moment?

Everyone has a different get-off-my-lawn moment, a fact that makes them suddenly feel their age. And the entertainment world, with all its unnaturally young-looking senior citizens and overly made-up kids, supplies more than its share of such realizations.Maybe it's the fact that Ralph Macchio, who played Daniel-san in the original "Karate Kid," is now the same age as Pat Morita was when he played
Ralph Macchio is 51, the same age Pat Morita was back when the two filmed 1984's original "Karate Kid" movie. How in the name of Cobra Kai did this happen?
Ralph Macchio is 51, the same age Pat Morita was back when the two filmed 1984's original "Karate Kid" movie. How in the name of Cobra Kai did this happen?moviescreenshots.blogspot.com / Today

Everyone has a different get-off-my-lawn moment, a fact that makes them suddenly feel their age. And the entertainment world, with all its unnaturally young-looking senior citizens and overly made-up kids, supplies more than its share of such realizations.

Ralph Macchio is 51, the same age Pat Morita was back when the two filmed 1984's original "Karate Kid" movie. How in the name of Cobra Kai did this happen?moviescreenshots.blogspot.com / Today

Maybe it's the fact that Ralph Macchio, who played Daniel-san in the original "Karate Kid," is now the same age as Pat Morita was when he played Mr. Miyagi. (Thanks, Yahoo and Roadside Attractions for that little day-brightener.) How in the name of Cobra Kai did this happen? Weren't they just waxing on and waxing off yesterday?

Or the fact that if Andie and Blane (or, as we prefer, Andie and Duckie) had stayed together after the 1986 film "Pretty in Pink," they could have adult kids or even grandkids by now.

Here are some more blasts from the "do-you-feel-old-yet?" department.

He's really 'Big'

Josh, the 12-year-old kid who turned into a 30-year-old in 1988's "Big," would be 37 by now.

Tom Hanks played a 13-year-old turned 30 in "Big." That kid would be 37 today.Today

Magical aging

He'll forever be a school-age wizard in our minds, but according to some geek math, Harry Potter would be either 33 or 34 today.

Save Ferris!

Ferris Bueller would be celebrating either his 26th or 27th high-school reunion. He's now older than Ben Stein was when Stein played the droning economics teacher who famously called "Bueller ... Bueller." (Still a righteous dude.) Want to feel even older? Alan Ruck, who was 29 when he played 18-year-old Cameron, is now 56.

Let my Cameron go ... to AARP? Alan Ruck, who played Cameron in "Ferris Bueller's Day Off, is now 56. Matthew Broderick (Ferris) is 50 and Mia Sara (Sloane) is 45.Paramount Pictures / Today

D'oh!

Assuming Maggie, Bart and Lisa were 1, 10 and 8 when "The Simpsons" began, they'd now be 24, 34, and 32.

Oh, baby

The twins born to Chandler and Monica's surrogate mother on the "Friends" finale would be 9. Ross' son with Carol, Ben, would be 19, and his daughter Emma, with Rachel, would be 11.

'Fast Times' indeed

Sean Penn, who played high-school senior Jeff Spicoli in 1982's "Fast Times at Ridgemont High," is now 52.

School days

John Travolta, who played Sweathog Vinny Barbarino on "Welcome Back, Kotter," is 59 -- almost twice as old as Gabe Kaplan was when he played Barbarino's teacher, Gabe Kotter, and three years older than John Sylvester White was when he played crotchety assisstant principal Mr. Woodman.

John Travolta is almost twice as old as Gabe Kaplan was when he played Travolta's teacher on "Welcome Back, Kotter."ABC Television / Getty Images / Today

Smells like twentysomething spirit

The baby on the Nirvana "Nevermind" album cover, Spencer Elden, is now 21.

One doodle that can't be un-did, homeskillet

The baby born to Juno in the 2007 movie "Juno" would be preparing for kindergarten.

Randee Dawn contributed to this story.