Good Genes or Good Docs

Billy Zane is as cool as an iceberg.

Here's the 31-year-old "Titanic" villain back at the movie's premiere in 1997 (left) -- and 15 years later, the still perfectly browed 46-year-old at an event in Chicago this week (right).

He's one smooth fella.

Bono is having a beautiful day.

Here's the 27-year-old U2 front man back in 1987 (left) -- and 25 years later, the 52-year-old humanitarian at an event in Rome this week (right).

Looking Fly.

Daniel Day-Lewis is great at more than just acting.

Here's the 34-year-old two-time Oscar winner back in 1991 (left) -- and 21 years later, the 55-year-old at a screening of his new film "Lincoln" this week (right).

There will be interesting neckwear.

Elvira, Mistress of the Dark aka Cassandra Peterson is anything but a horror.

Here's the 39-year-old goth babe back in 1990 (left) -- and 22 years later, the buxom 61-year-old at an event in L.A. last month (right).

The scariest thing about Elvira ... she doesn't age.

The only thing hotter than Ben Affleck's career right now is ... Ben Affleck.

Here's the 25-year-old Oscar winner back in 1997 (left) -- and 15 years later, the 40-year-old "Argo" director/star at the film's London premiere this week (right).

Just like "Gigli," Ben is da bomb.

Glenn Close really is "The Natural."

Here's the 35-year-old "Fatal Attraction" star back in 1982 (left) -- and 30 years later, the 65-year-old "Albert Nobbs" babe at a charity gala in Beverly Hills this week (right).

No sign of damages here.

Mary Hart still has it going on.

Here's the 35-year-old former "Entertainment Tonight" host back in 1986 (left) -- and 36 years later, the 61-year-old former Miss South Dakota at an event in L.A. this week (right).

She's the former hostess with the mostess.

Mary Steenburgen gets better with age.

Here's the 34-year-old Oscar winner back in 1987 (left) -- and 25 years later, the smokin' hot 59-year-old at an event in Beverly Hills this week (right).

There really are perks to being married to Ted Danson.

John Travolta is stayin' alive.

Here's the 23-year-old "Saturday Night Fever" disco dude back in 1977 (left) -- and 35 years later, the 58-year-old "Battlefield Earth" hunk in Paris on Friday (right).

Face/off.

Back in 1990, Barack Obama was a 29-year-old Harvard Law student and 43-year-old Mitt Romney was working at Bain Capital.

But now Barack, 51, and Mitt, 65, are in the final months of campaigning for the Presidential election.

The question is...

Kyra Sedgwick will always be a golden girl.

Here's the 23-year-old "Closer" star back in 1988 (left) -- and 24 years later, the 47-year-old at the premiere of "The Possession" in L.A. this week (right).

Mrs. Kevin Bacon is one degree to ageless.

Jennifer Grey is having the time of her life.

Here's the 27-year-old actress before getting her infamous nose job at the premiere of "Dirty Dancing" in 1987 (left) -- and the 52-year-old at a 25th anniversary screening of the classic dance flick in Hollywood on Tuesday (right).

Even after all these years, no one puts baby in the corner.

1980's action star Dolph Lundgren still packs a lot of muscle.

Here's the 28-year-old "He-Man" back in 1986 (left) -- and 26 years later, the 54-year-old at "The Expendables 2" premiere in London this week (right).

Blondes do have more, er, fun.

Nancy Kerrigan is an American ice princess.

Here's the 24-year-old Olympic figure skater back when she won the silver medal in 1994 (left) -- and 18 years later, the 42-year-old at an event in Boston earlier this year (right).

She's gold.

Olympic gymnast Mary Lou Retton will always be a golden girl.

Here's the 16-year-old gold medal winner back in 1984 (left) -- and 28 years later, the 44-year-old at an event in NYC earlier this year (right).

Tens across the board.

Believe it or not, but Harrison Ford turns 70 -- SEVENTY! -- today.

Here's the 39-year-old "Raiders of the Lost Ark" star back in 1981 (left) -- and 31 years later, the earring clad "Star Wars" icon at an event in NYC earlier this year (right).

The question ...