"Billions," "Band of Brothers" and "Homeland" star Damian Lewis turned 50 on Feb. 11.
RELATED: Stars turning 40 in 2021
"Stranger Things" actress Winona Ryder has a reason to celebrate on Oct. 29: It's her 50th birthday!
RELATED: Stars turning 90 in 2021
Christine Taylor, who's appeared in films like "The Brady Bunch Movie," "The Wedding Singer" and "Zoolander," says hello to 50 on July 30.
Detroit rap-rocker Kid Rock celebrated his 50th birthday on Jan. 17.
"Mad Men" star Jon Hamm celebrates his 50th birthday on March 10. He has several films in the works including "No Sudden Move," "Confess, Fletch" and "Alpha Gang."
Michael C. Hall — the Golden Globe-winning actor who played the titular serial killer on Showtime's "Dexter" and will return for a 2021 revival — turned 50 on Feb. 1.
Jared Leto has been winning fans for decades thanks to his starring roles on "My So-Called Life" and in "Dallas Buyers Club" as well as his work fronting the band Thirty Seconds to Mars. The actor-musician turns 50 on Dec. 26.
Academy Award, Emmy and Golden Globe winner Regina King celebrated her 50th birthday on Jan. 15. She'll next appear in the film "The Harder They Fall."
On June 5, "Instant Family" actor Mark Wahlberg turns the big 5-0. Next up, he'll appear in two films set to be released in 2021: "Infinite" and "Uncharted."
Music star Ricky Martin celebrates his milestone 50th birthday on Christmas Eve — Dec. 24.
On Jan. 24, Miss USA 1993 and "The Real Housewives of Atlanta" star Kenya Moore celebrated her milestone 50th birthday.
On Jan. 11, Grammy Award-winning singer Mary J. Blige celebrated her 50th birthday.
Jeremy Renner, who portrays Hawkeye in the Marvel Cinematic Universe and the forthcoming Disney+ "Hawkeye" series, joined the 50s club on Jan. 7.
Another Marvel Cinematic Universe star — Paul Bettany, who plays Vision in the "Avengers" franchise and on TV's "WandaVision" — turns 50 in 2021. His big day is on May 27.
"Parks and Recreation" comedienne Amy Poehler, who more recently created the animated series "Duncanville," turns the big 5-0 on Sept. 16.
On Christmas Day, Justin Trudeau — Canada's prime minister — will celebrate his 50th birthday.
"Riverdale" star Mark Consuelos has a big birthday on March 30: He turns 50!
Country music singer Sara Evans turned the big 5-0 on Feb. 5.
"Dead to Me" actress Christina Applegate says hello to her 50s on Nov. 25.
On June 28, Tesla and SpaceX CEO Elon Musk — who in January 2021 became the world's richest man with a net worth of $195 billion, according to the Bloomberg Billionaires Index — celebrates his 50th birthday.
Sacha Baron Cohen, who most recently released "Borat Subsequent Moviefilm" in 2020, says goodbye to his 40s on Oct. 13.
Angela Kinsey, who portrayed Angela Martin on "The Office," turns the big 5-0 on June 25.
Snoop Dogg will light things up with 50 birthday candles on Oct. 20.
Scottish actor Ewan McGregor celebrates his 50th birthday on March 31.
On July 1, rapper Missy Elliott will blow out 50 candles on her birthday cake.
Justin Theroux, who starred as Kevin Garvey on HBO's "The Leftovers," has a reason to celebrate on Aug. 10: He's turning 50!
"Father of the Bride" star Kimberly Williams-Paisley turns 50 on Sept. 14.
The Roots drummer and frontman Questlove turned 50 on Jan. 20.
David Tennant, whose acting credits include "Doctor Who" and "Jessica Jones," will celebrate his 50th birthday on April 18.
From Broadway to the big screen, Idina Menzel has crafted an extraordinary career in showbiz! The "Frozen" franchise star, who will next appear in the films "Cinderella" and "American Murderer," turns the big 5-0 on May 30.
"The Haunting of Hill House" and "The Haunting of Bly Manor" actress Carla Gugino will blow out 50 candles on her birthday cake on Aug. 29.
On March 22, comedian Keegan-Michael Key will enter the 50s club.
Bridget Moynahan, who made her feature film debut in 2000's "Coyote Ugly," will step into her 50s on April 28. The actress-model also portrays Erin Reagan on the crime drama series "Blue Bloods."
"Rush Hour" film franchise star Chris Tucker marks his 50th birthday on Aug. 31.
Writer-director Patty Jenkins, whose blockbuster films include 2017's "Wonder Woman" and its 2020 sequel, celebrates her 50th birthday on July 24.
Sofia Coppola, who earned the 2004 Academy Award for best original screenplay for writing "Lost in Translation," turns 50 on May 14. Her latest film was 2020's "On the Rocks," which she directed, wrote and produced.
On Nov. 10, actor Walton Goggins — who's starred on everything from "The Shield" and "Justified" to "Sons of Anarchy" and "The Righteous Gemstones" — blows out 50 candles on his birthday cake.
"Jacka**" franchise star Johnny Knoxville blows up his 50th birthday cake on March 11.
Tony Award-winning actress Renée Elise Goldsberry — who originated the role of Angelica Schuyler in the Broadway musical "Hamilton" — turned 50 on Jan. 2.
On March 27, "Castle," "Firefly" and "The Rookie" star Nathan Fillion will step into his 50s.
Feb. 26 marks Grammy winner (turned doula and certified midwife!) Erykah Badu's 50th birthday.
"Community" star Joel McHale celebrates his 50th birthday on Nov. 20.
Alfonso Ribeiro, who's best known as Carlton Banks on "The Fresh Prince of Bel-Air" and as the host of "America's Funniest Home Videos," will walk into his 50s on Sept. 21.
Emmy- and BAFTA-winning actor Martin Freeman — the star of such varied fare as the original British version of "The Office," the "The Hobbit" trilogy and TV's "Sherlock" — celebrates his 50th birthday on Sept. 8.
"The Lord of the Rings" actor Sean Astin will celebrate his 50th birthday on Feb. 25.
Prolific actor Peter Sarsgaard turns 50 on March 7.
"The Newsroom," "Mary Poppins Returns" and "Lars and the Real Girl" actress Emily Mortimer turns 50 on Oct. 6.
"Get Low," "Yeah" and "Turn Down for What" rapper Lil Jon celebrated his 50th birthday on Jan. 17.
Broadway star and "Star Trek: Discovery" actor Anthony Rapp turns the big 5-0 on Oct. 26
Ralphie's all grown up! Actor-turned-producer Peter Billingsley celebrates his 50th birthday on April 16.
Maybe E.T. will phone Henry Thomas at home on Sept. 9: It's the day the actor, who played Elliott in "E.T. the Extra-Terrestrial," turns 50.
On Aug. 20, English comedy star and "Britain's Got Talent" judge David Walliams marks his 50th birthday.
Want to know which Hollywood stars are entering their 50s in 2021? Join Wonderwall.com as we take a look at all the celebrities who were born in 1971… beginning with this former "The Real Housewives of Beverly Hills" star. Denise Richards blew out 50 candles on her birthday cake on Feb. 17. The former Bond girl next appears in the films "Saturday at the Starlight" and "Timecrafters: The Treasure of Pirate's Cove." Keep reading for more stars turning 50 this year…
RELATED: Stars turning 30 in 2021