Jennifer Garner

Age in first photo:25Age in second photo:40Verdict:Yeah, the Neutrogena’s working.

Prince

Age in first photo:27Age in second photo:49Verdict:There must be something in the Purple Rain.

Halle Berry

Age in first photo:24Age in second photo:44Verdict:AsCatwoman, she had nine lives.

Age in first photo: 20 Age in second photo: 48 Verdict: He’s Uncle Jesse; of course he’s ‘‘Forever’’ young.

Maureen Donaldson/Getty Images; Jason Merritt/Getty Images

In real life, she may have even more.

Bacon’s number, naturally, is the lowest of them all.

Tom Cruise

Age in first photo:26Age in second photo:49Verdict:The guy must be doingsomethingright.

Jennifer Garner | Age in first photo: 25 Age in second photo: 40 Verdict: Yeah, the Neutrogena’s working.

Everett Collection; Larry Busacca/Getty Images

Keanu Reeves

Age in first photo:26Age in second photo:48Verdict:Whoa.

It’d make as much sense asthat ending.

Dylan McDermott

Age in first photo:31Age in second photo:50Verdict:50 years old?!

Age in first photo: 27 Age in second photo: 49 Verdict: There must be something in the Purple Rain.

AP; Vince Bucci/Getty Images

He’s either 35 or 350; there is no middle ground.

Rob Lowe

Age in first photo:20Age in second photo:48Verdict:Heliterallystopped getting older afterSt.

Age in first photo: 24 Age in second photo: 44 Verdict: As Catwoman , she had nine lives. In real life, she may have even

Getty Images; David Livingston/Getty Images

Age in first photo: 23? Age in second photo: 39? Verdict: And this is why we’ve still got a crush on Jordan Catalano.

Ron Galella, Ltd./WireImage; Marco Prosch/Getty Images

Age in first photo: 23 Age in second photo: 43 Verdict: Clueless writer/director Amy Heckerling’s latest movie is about a pair of eternally hot, BFF

Getty Images; Brian To/WireImage

Age in first photo: 27 Age in second photo: 54 Verdict: Maybe the lower your Bacon Number , the closer you are to immortality. Bacon’s

Ron Galella/WireImage; Donna Ward/Getty Images

Age in first photo: 22 Age in second photo: 43 Verdict: Of course she’s ageless – she’s an Angel , after all.

Getty Images; Alberto E. Rodriguez/Getty Images

Age in first photo: 26 Age in second photo: 49 Verdict: The guy must be doing something right.

Getty Images; Steve Granitz/WireImage

Age in first photo: 21? Age in second photo: Five days shy of 33? Verdict: It takes genes of steel to pull off playing a

Jason Kirk/Newsmakers; Victor Decolongon/Getty Images

Age in first photo: 19 Age in second photo: 46 (one week before her 47th birthday) Verdict: Did she suck just a little life out

Getty Images; Jason Merritt/Getty Images

Age in first photo: 26 Age in second photo: 48 Verdict: Whoa.

Michael Ochs Archives/Getty Images; Randy Holmes/Getty Images

Age in first photo: 28? Age in second photo: 48? Verdict: Her character in My Cousin Vinny is named Mona Lisa — fitting, since Tomei’s

Ron Galella/WireImage; David Livingston/Getty Images

Age in first photo: 25 Age in second photo: 44 Verdict: Theory: Men In Black 3 was real, and the man we all think is

Getty Images; Jason LaVeris/FilmMagic

Age in first photo: 26 Age in second photo: 42 Verdict: She’s really a well-dressed ageless goddess, underneath it all.

Tim Mosenfelder/Getty Images; Larry Busacca/Getty Images

Age in first photo: 31 Age in second photo: 50 Verdict: 50 years old?! No way. He’s either 35 or 350; there is no middle

Ron Galella, Ltd./WireImage; Frazer Harrison/Getty Images

Age in first photo: 48? Age in second photo: 64 ? Verdict: Into the Woods knows what’s up: a cow as white as milk, a

Manny Hernandez/Getty Images; Amy Sussman/Getty Images

Age in first photo: 20 Age in second photo: 48 Verdict: He literally stopped getting older after St. Elmo’s Fire .

Ron Galella/WireImage; Craig Barritt/Getty Images

Age in first photo: 29? Age in second photo: 41? Verdict: How does the funnyman stay so baby-faced? We’re Clueless .

Ron Galella/WireImage; Pascal Le Segretain/Getty Images