Good Genes or Good Docs

Patrick Dempsey will always be McDreamy.

Here’s a 21-year-old version of the super smooth actor at a movie premiere in 1987 (left) and 28 years later ... a more stubbly snapshot of the Grey's God -- who turned 50 earlier this week -- at a charity screening in Los Angeles late last month (right).

911!

The question is…

AJ McLean needs to quit playing games with our hearts.

Here’s a 19-year-old version of the goatee sportin’ boybander in Miami Beach back in 1997 (left) and 18 years later ... the fully bearded 38-year-old at a charity event in Los Angeles in 2015 (right).

"Larger than life."

The question is...

Morris Chestnut's good looks are a tough nut to crack!

Here’s a 23-year-old version of the sexy actor suited up at a premiere party in Hollywood back in 1992 (left) and 23 years later … the 46-year-old 'Best Man' on the red carpet in Beverly Hills earlier this year (right).

The question is ...

Beverly D'Angelo's beauty has never taken a vacation.

Here's a 34-year-old version of the "Christmas Vacation" babe at a film premiere in Los Angeles back in 1985 (left) and 30 years later ... the 64-year-old Christmas movie MILF looking angelic earlier this year (right).

Christmas miracle.

The question is ...

Chewbacca's good looks are a force to be reckoned with!

Here's the well groomed Wookiee and Han Solo's long-standing homie in "Star Wars Episode IV: A New Hope" back in 1977 (left) and 38 years later ... the gentle giant letting his hair down on the red carpet for the "Star Wars: The Force Awakens" in London earlier this week (right).

“RHAGHGHRRAAAWWWGHRAAGH.”

The question is ...

Adam Sandler ... what a fine lookin’ Jew!

Here’s a 31-year-old version of the 'SNL' funny man at a movie premiere back in 1997 (left) and 18 years later ... the godfather of Hanukkah -- now 49 years old -- at a movie premiere in Los Angeles late last month (right).

So much funukkah!

The question is...

Jay Z’s got 99 problems, but aging ain’t one.

Here’s a 27-year-old version of the New York rapper mean muggin' a camera back in 1996 (left) and 19 years later ... the Rap boss and father of one -- who celebrated his 46th birthday earlier this week -- at a Madison Square Garden event earlier this year (right).

Hova!

The question is ...

Jon Stewart's good looks haven't retired.

Here's a 32-year-old version of the MTV host hanging out in Los Angeles back in 1994 (left) and 21 years later ... the "Daily Show" staple -- who's celebrating his 53rd birthday this weekend -- at a NYC gala last month (right).

What a show!

The question is ...

Jamie Lee Curtis is scary hot.

Here's a 25-year-old version of the knife wielding "Halloween" actress at an awards show back in 1983 (left) and 32 years later ... the "Scream Queens" regular and mother of two -- who is celebrating her 57th birthday on Sunday -- at a fancy LA gala late last month (right).

Birthday bae.

The question is ...

Gordon Ramsay's good looks are always perfectly served.

Here's a 35-year-old version of the food aficionado at his self titled restaurant in London back in 2001 (left) and 14 years later ... the condescending TV host -- who is celebrating his 49th birthday this weekend -- at a ball in England earlier this year (right).

What's cookin' good lookin'?

The question is ...

Gabrielle Union ... she’s all that!

Here’s a 29-year-old version of the Hollywood hottie flashing her pearly whites at a movie premiere back in 2001 (left) and 14 years later ... an even sexier version of Dwyane Wade's wifey -- who celebrated her 43rd birthday earlier this week -- at a fancy New York party last month (right).

Old age? Bring it on.

The question is…

Eminem's looks don't need a remix.

Here's a 27-year-old version of the Slim Shady songbird looking serious in Dublin back in 1999 (left) and 16 years later ... the "Rap God" -- who is celebrating his 43rd birthday this weekend -- looking even more serious at an NYC movie last summer (right).

There's nothing cheesy about Brett Favre's good looks.

Here's a 22-year-old version of the Green Bay Packers quarterback in Mississippi on NFL draft day back in 1991 (left) and 24 years later ... the iconic athlete and father of two -- who is celebrating his 46th birthday this weekend -- at an awards show in LA earlier this year (right).

Every little thing Sting does is magic.

Here's a 33-year-old version of the Police frontman and sex symbol looking good in London back in 1984 (left) and 31 years later ... a much grizzlier version of the solo singer -- who celebrated his 64th birthday earlier this week -- at an event in NYC last month (right).

Mark Hamill's good looks strike back!

Here's a 29-year-old version of the jedi dreamboat at a "Star Wars" premiere back in 1980 (left) and 35 years later ... the lord of the lightsaber -- who celebrated his 64th birthday earlier this week -- at an event in Anaheim last summer (right).

Marc Anthony's looks are always caliente!

Here's a 29-year-old version of the salsa sensation in New York City's Time Square back in 1997 (left) and 18 years later ... Jennifer Lopez's baby daddy -- who celebrated his 47th birthday this week -- at a Latin music gathering in Miami Beach earlier this year (right).