Bianca Lawson (“Pretty Little Liars”), 32
Pretty Little Liars” star Bianca Lawson (Maya) has been playing high school students for 20 years. As in two decades. It boggles our mind that someone who was a regular on “Saved by the Bell: The New Class” still can pass for a teenager.

Alison Brie (“Community,” “Mad Men”), 29
Alison Brie plays college student Annie Edison on NBC’s “Community,” but in real life she graduated from California Institute of the Arts way back in 2005. This brunette beauty, who also stars as Trudy Campbell on AMC’s “Mad Men,” was born on December 29, 1982.

Randy Jackson (“American Idol”), 55
It’s hard to believe that “American Idol’s” longest-standing judge, Randy Jackson, was born on June 23, 1956, but the truth is in his resume. Not only has he worked with everyone in the music biz, from Whitney Houston to Mariah Carey, but he’s also jammed with Journey and Santana.

LL Cool J (“NCIS: Los Angeles”), 44
Like his “NCIS: Los Angeles” character, LL Cool J (Sam Hanna) is multitalented. Born James Todd Smith on January 14, 1968, he got his start as a rapper before taking the leap into acting. Now 44, he’s in awesome shape, continues to make new music, and stars on one of TV’s highest-rated shows.

James Lipton (“Inside the Actors Studio”), 85
As the executive producer, writer, and host of Bravo’s “Inside the Actors Studio,” James Lipton certainly knows how to keep himself busy. Although the 85-year-old (born September 19, 1926) is well beyond retirement age, he shows no sign of slowing down.

Cory Monteith (“Glee”), 29

Glee” star Cory Monteith (Finn Hudson) dropped out of high school in the ninth grade, but thanks to his boyish charm and youthful good looks, he’s able to relive his missed high-school years over a decade later.

Jim Parsons (“The Big Bang Theory”), 38

We’re convinced that “The Big Bang Theory’s” Jim Parsons has a secret formula for youth. Jim was born on March 24, 1973, which makes him about 10 years older than his onscreen counterpart, science prodigy Sheldon Cooper.

Pauley Perrette (“NCIS”), 42

It’s not just the pigtails that make “NCIS’s” Pauley Perrette (Abby Sciuto) look forever young, but they certainly don’t hurt. The popular star has enough energy and enthusiasm to make anyone jealous, but even more so when you consider that she’ll be 43 on March 27.

Betty White (“Hot in Cleveland”), 90

“Hot in Cleveland” star Betty White (Elka Ostrovsky) is white hot at the age of 90. The only surviving “Golden Girl,” Betty, who was born on January 17, 1922 (yes, 1922!), makes grandmothers everywhere jealous.

WOW…I HAD NO IDEA THEY WERE THAT OLD…I NEED TO FOLLOW THEM TO THE FOUNTAIN OF YOUTH!!