Yep! Believe it or not, the eternally youthful Janeane Garofalo turns 50 on September 28, almost 20 years after starring in "The Truth About Cats & Dogs." She's not the only one joining the 50-plus club this year ... Gabriel Olsen/FilmMagic/getty images

Fans of "Peggy Sue Got Married" and "Moonstruck" may find it hard to believe, but Nicolas Cage turned 50 in January. Heather Kennedy/Getty Images for SXSW

Mariska Hargitay represents well for her age group as Sgt. Olivia Benson on "Law & Order: SVU." Michael Parmelee/NBC/NBCU Photo Bank/getty images

Matt Dillon continues to stay gold (any fans of "The Outsiders" out there?) at age 50. Stephen Lovekin/Getty Images

Wanda Sykes is probably laughing because she's clearly found the fountain of youth. Paul Drinkwater/NBC/NBCU Photo Bank/getty images

How in the world is Rob Lowe even in this gallery? Seriously. Colleen Hayes/NBC/NBCU Photo Bank

Elle Macpherson is a super model of aging well. Pascal Le Segretain/Getty Images

You know you are getting old when Ian Ziering and members of the "Beverly Hills, 90210" cast are turning 50. Christopher Polk/Getty Images for The People's Choice Awards

April 4 marked the 50th birthday of actor/director David Cross. Larry Busacca/Getty Images

We haven't seen as much of actor Hank Azaria as we'd like, but we have certainly heard from him a great deal on "The Simpsons." He rang in his 50th year in April. Astrid Stawiarz/Getty Images

Russell Crowe turned 50 on April 7. We are sure the "Noah" star was flooded with well wishes. OZAN KOSE/AFP/Getty Images

Oh baby you ... are turning 50! Rapper and DJ Biz Markie celebrated his big day on April 8. Michael Loccisano/Getty Images for HBO

We wonder whether, at this age, Crispin Glover would want to go "Back to the Future." The actor celebrated his 50th birthday on April 20. Rommel Demano/Getty Images

Who wants to be ... 50? Comedian and "Who Wants to be a Millionaire" host Cedric the Entertainer turned the big 5-0 on April 24. Earl Gibson III/Getty Images for BET

Actor Djimon Hounsou, star of "Amistad" and "Guardians of the Galaxy," turned 50 on April 24. Alberto E. Rodriguez/WireImage/getty images

Many fans still think of Melissa Gilbert as young Laura Ingalls on "Little House on the Prairie." But she turned 50 on May 8, and that means Half Pint is all grown up. Rob Kim/Getty Images

Even at 50, Stephen Colbert, right, is young at heart -- as you can see here when the "Late Show" host-to-be posed for a selfie with Jimmy Fallon. Colbert turned the big 5-0 on May 13. Theo Wargo/Getty Images for The Tonight Show Starring Jimmy Fallon

"Hunger Games" star and rocker Lenny Kravitz can still pull off the sparkling eye makeup. He celebrated his 50th on May 26. Lionsgate

We hope Adam Carolla will never stop being young at heart with his boyish humor. The comedian/host turned 50 on May 27. Imeh Akpanudosen/Getty Images for Variety

Wynonna Judd turned 50 on May 30. Now there's something to sing about. Brian Ach/Getty Images for Steinberg Sports & Entertainment

Both Darryl McDaniels and Joseph Simmons of Run DMC celebrate their 50th birthdays this year. McDaniels' big day was in May, and Simmons' 50th follows in November. Stephen Lovekin/Getty Images for Bud Light

Courteney Cox is an excellent role model for the cougars on her show, "Cougar Town," and in real life, too. The former "Friends" star celebrated her 50th birthday on June 15. Randy Holmes/ABC via Getty Images

The kids, nerds, geeks and all still love "Buffy the Vampire Slayer" creator Joss Whedon at any age. The "Avengers" writer-director turned 50 on June 23. Mike Windle/Getty Images for Equality Now

Welcome to the wonderful world of quinquagenarians, Jose Canseco! The former baseball player turned 50 on July 2. Alberto E. Rodriguez/Getty Images/File

She may be the voice of the decidedly younger Lisa Simpson on "The Simpsons," but Yeardley Smith turned 50 on July 3. Imeh Akpanudosen/Getty Images/File

Rock on Courtney Love. The musician/actress turned 50 on July 9. Ethan Miller/Getty Images

What we wouldn't give to have a seat at Wendy Williams' birthday dinner table. The media maven, who turned 50 on July 18, always has the hottest scoop. Mike Coppola/Getty Images for Good Shepherd Services/File

Inquiring minds wonder if Dean Winters does his own stunts as "Mayhem" in those Allstate commercials. He's in great shape. FOX via Getty Images

John Leguizamo had a milestone birthday on July 22 as he celebrated turning 50. And the comedic actor is not alone. He also shared his day with another funny man ... Araya Diaz/Getty Images for The Weinstein Co./File

David Spade also celebrated the big 5-0 on July 22. From appearing in the movie "Grown Ups" to being an official grown-up, Spade wears it well. Cindy Ord/Getty Images for SiriusXM/File

Soundgarden frontman Chris Cornell continues to perform with the vigor of a man half his age. He turned 50 in July. Jag Gundu/Getty Images

No matter her age, Sandra Bullock will always be America's sweetheart. July 26 marked her 50th birthday. Michael Buckner/Getty Images

Awww! Seems like only yesterday Lori Loughlin was going into labor as Rebecca on "Full House" during Michelle's birthday party. Loughlin celebrated her own b-day by turning 50 on July 28. Frederick M. Brown/Getty Images

Vivica A. Fox is in as good a shape as she was during her "Booty Call" days. She turned 50 on July 30. Jason Kempin/Getty Images for BET

Counting Crows frontman Adam Duritz, who turned 50 in August, barely looks his age. Sonia Moskowitz/Getty Images

Mary-Louise Parker became a stunning member of the 50 club on August 2. Andrew H. Walker/Getty Images for Esquire

Breaking news! Hoda Kotb of the "Today" show turned 50 on August 8. Peter Kramer/NBC/NBC NewsWire via Getty Images

Molly Shannon remains believable as Catholic schoolgirl Mary Katherine Gallagher. She's a "Superstar!" Michael Buckner/Getty Images for OKOW

Blair Underwood has remained as youthful as he was in his "L.A. Law" days . But on August 25, the actor hit the big 5-0. John Sciulli/Getty Images for Gillette

Excellent! Keanu Reeves turned 50 on September 2. Fans would love a new "Bill & Ted" sequel as a gift. We're just saying. TORU YAMANAKA/AFP/Getty Images/File

Rosie Perez has clearly decided to "Fight the Power" of aging. The actress and new co-host of "The View" celebrated her 50th birthday on September 6. Astrid Stawiarz/Getty Images

Holly Robinson Peete doesn't appear to have aged much at all from her "21 Jump Street" days. John Sciulli/Getty Images for NAACP Image Awards

Country star Trisha Yearwood became a quinquagenarian on September 19. Larry Busacca/Getty Images

"Extreme Makeover: Home Edition" host Ty Pennington has a baby face, but he turns 50 in October. Gabriel Olsen/FilmMagic/getty images

It's fun to imagine how Ally McBeal would have reacted to turning 50. The actress who plays her, Calista Flockhart, does just that in November. ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images

Robin Givens is smiling pretty as she exits her 40s. Andrew H. Walker/Getty Images

Actor Don Cheadle is using these years to get into the superhero game, with roles in the "Iron Man" films, "Avengers" and even "Captain Planet. " (Warning: There is language in that clip.) Frazer Harrison/Getty Images for DGA

Marisa Tomei doesn't mind a nude scene, as evidenced in "Before the Devil Knows You're Dead." She's holding it down for actresses in her age group. Ben Gabbe/Getty Images

"Desperate Housewives" star Teri Hatcher turns 50 in December. Valerie Macon/Getty Images