Good Genes or Good Docs

Jennifer Love Hewitt's looks have stuck since "Last Summer."

Here's an 18-year-old version of the "I Know What You Did Last Summer" star at an awards event in Hollywood back in 1997 (left) and nearly 18 years later ... the "Criminal Minds" actress -- who is celebrating her 36th birthday this weekend -- in Los Angeles last year (right).

Anna Wintour's beauty is always in style.

Here's a 42-year-old version of the fashion forward icon leaving an exclusive party with her signature blunt bob haircut back in 1991 (left) and 24 years later -- the now 65-year-old staple sitting front row at one of the many fashion shows at NYFW earlier this week (right).

Ashton Kutcher's chiseled good looks haven't changed since the "'70s!"

Here's a 21-year-old version of the "Dude, Where's My Car" actor at an awards show back in 1999 (left) and 16 years later ... the "Two and a Half Men" star -- who celebrated his 37th birthday this weekend -- at a movie premiere earlier this month (right).

Tom Hanks was spotted at a New York Rangers hockey game earlier this week with an old friend and co-star Wilson from the 2000 film "Cast Away" -- and even though Wilson was thought to be lost at sea ... it would appear that he's been using some unregulated means to keep his image pumped through the years.

Alicia Keys' beauty is on fire!

Here's a 20-year-old version of the "Fallin'" singer at a Grammys party in Los Angeles back in 2001 (left) and almost 14 years later ... the mother of two -- who is celebrating her 34th birthday today -- at a book release in New York City late last year (right).

Laura Dern's beauty is anything but "Jurassic."

Here's a 30-year-old version of the "Jurassic Park" matriarch at a benefit in Santa Monica back in 1997 (left) and 18 years later -- the now 47-year-old mother of two at a film festival in Palm Springs earlier this year (right).

Ryan Seacrest's good looks are an "American Idol."

Here's a 28-year-old version of the television show host at an "Idol" tour stop back in 2002 (left) and 12 years later ... the now 40-year-old Rockin' New Years Eve host -- and all around awesome dude -- during the holiday season in New York City (right).

Denzel Washington's good looks are "Unstoppable."

Here's a 30-year-old version of the "St. Elsewhere" actor looking very serious back in 1984 (left) and 30 years later ... the "American Gangster" -- who is celebrating his 60th birthday today -- at a NYC party earlier this year (right).

Steven Spielberg is always ready for his close up!

Here's a 39-year-old version of the "Goonies" god at an old school Hollywood event back in 1985 (left) and nearly 30 years later ... the movie making mogul -- who celebrated his 68th birthday earlier this week -- at a fancy Washington D.C. party earlier this month (right).

Taylor Swift's beauty is anything but a "Blank Space."

Here's a 17-year-old version of the pop singer at an awards show back in 2006 (left) and eight years later ... the international sensation -- who celebrated her 25th birthday this weekend -- at a ball last week (right).

Woody Allen's good looks are "Sweet and Lowdown."

Here's a 42-year-old version of the "Annie Hall" mastermind at a Studio 54 party back in 1977 (left) and 37 years later... the "Midnight in Paris" writer -- who celebrated his 79th birthday last week -- at a film event in Florida last month (right).

Christina Applegate is still a Bundy beauty.

Here's a 17-year-old version of the "Married With Children" star at a children's event back in 1988 (left) and 26 years later... the "Anchorman" actress -- who celebrated her 43rd birthday last week -- in San Diego last summer.

Chloe Sevigny looked like Chloe Sevigny before it was even a thing.

Here's a 22-year-old version of the "Kids" actress at a NYC party that was so cool you'd never know about it (left) and 18 years later... the fashion muse and queen to the hipsters -- who celebrated her big 4-0 last week -- at a different party you're still not cool enough to know about a few weeks back (right).

Whoopi Goldberg's beauty is a view to behold!

Here's a 31-year-old blue-eyed version of the "The Color Purple" star at a Beverly Hills lunch back in 1986 (left) and 28 years later the brown-eyed talk show host -- who celebrated her 59th birthday earlier this week -- at a "Sister Act" event in Spain last month (right).

Amen!

Eric Dane is a huge star!

Here's a 31-year-old version of the "Charmed" actor at a fancy Hollywood movie premiere back in 2003 (left) and 11 years later -- the "Grey's Anatomy" hunk -- who celebrates his 42nd birthday this weekend -- at a store opening last month (right).

Nurse!

There's nothing satirical about "Weird Al" Yankovic's good looks!

Here's a 27-year-old version of the polka enthusiast just before his Michael Jackson's "Bad" parody prime (left) -- and 28 years later, the squeezebox slayer -- who celebrated his 55th birthday in October -- at a Hollywood charity event earlier this month (right).