Alicia Keys
Happy Birthday! The singer celebrates the big 4-0 on Jan. 25.
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Chris Evans
Captain America turns 40 on June 13.
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Justin Timberlake
The father of two turns the big 4-0 on Jan. 31.
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Beyoncé Knowles
Queen B celebrates on Sept. 4.
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Kelly Rowland
Beyoncé’s bestie also turns 40 this year, on Feb. 11.
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Jessica Alba
Let’s get Honest: Alba turns 40 on April 28.
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Britney Spears
Spears was “Born to Make You Happy” on Dec. 2.
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Meghan Markle
The Duchess of Sussex will celebrate the milestone on Aug. 4.
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Amy Schumer
Nothing funny here: Schumer is 40 on June 1.
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Natalie Portman
The actress will be 40 on June 9.
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Nicole Richie
Richie will blow out the candles on Sept. 21.
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Rami Malek
The Oscar winner celebrates on May 12.
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Serena Williams
The tennis champ swings into 40 on Sept. 26.
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Roger Federer
Federer turns 40 just weeks prior, on Aug. 8.
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Tom Hiddleston
The Avengers star turns 40 on Feb. 9.
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Danielle Fishel
The Boy Meets World star is 40 on May 5.
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Sienna Miller
Miller’s birthday is amongh the last of the year, on Dec. 28.
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Pitbull
Don’t Stop the Party: Pitbull turned 40 on Jan. 15.
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Taylor Kitsch
Clear eyes, full hearts, can’t forget the April 8 birthday for the actor.
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Krysten Ritter
Trust us: Ritter turns 40 on Dec. 16.
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Christina Milian
The mom-to-be will have even more to celebrate on Sept. 26 this year.
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Julia Stiles
Save the Last Dance for Stiles’ birthday celebration, on March 28.
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Rachel Bilson
Hard to believe Summer will be toasting her 40th this summer, on Aug. 25.
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Jennifer Hudson
You’re gonna love that the Oscar winner turns 40 on Sept. 12.
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Joseph Gordon-Levitt
We don’t hate that the actor is turning 40 on Feb. 17.
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Larisa Oleynik
His 10 Things I Hate About You costar turns 40 on June 7.
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Susan Kelechi Watson
This Is the actress’ birthdate: Nov. 11.
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Leslie Odom Jr.
Odom’s Burr-thday is Aug. 6.
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Jonathan Taylor Thomas
The child star celebrates four decades on Sept. 8.
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Chad Michael Murray
Another young star grows older: Murray’s birthday is Aug. 24.
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Paris Hilton
The stars aren’t blind to Hilton’s big day of Feb. 17.
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Taylor Kinney
The actor’s 40th is on July 15.
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Michelle Dockery
If only she could be back at Downton to celebrate her 40th on Dec. 15.
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Chrishell Stause
Selling Sunset‘s breakout star turns 40 on July 21.
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Kunal Nayyar
The actor will mark his birthday with a Bang on April 30.
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Josh Gad
Olaf is all grown up: Gad turns 40 on Feb. 23.
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Alexis Bledel
Can you believe Rory Gilmore will be 40 on Sept. 16?
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Josh Groban
Perhaps the singer will serenade himself when he turns 40 on Feb. 27.
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Hayden Christensen
The Star Wars star turns 40 on April 19.
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Elijah Wood
Wood’s big day is Jan. 28.
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Bryce Dallas Howard
The actress marks another trip around the sun on March 2.
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Uzo Aduba
Nothing crazy about this: Aduba turns 40 on Feb. 10.
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Patrick J. Adams
The Suits star celebrates 40 on Aug. 27.
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Abigail Spencer
His costar is 40, too, this year, on Aug. 4.
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Keyshia Cole
Singer Cole turns 40 on Oct. 15.
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Jesse Williams
Williams celebrates the big 4-0 on Aug. 5.
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Alessandra Ambrósio
The Victoria’s Secret Angel flies into 40 on Feb. 11.
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Adriana Lima
Her fellow supermodel is also 40 this year, on June 12.
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Meagan Good
It’ll be a Good day when the actress turns 40 on Aug. 8.
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Rachel Platten
We’ll all sing “Fight Song” in her honor on May 20.
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Caterina Scorsone
The Grey’s Anatomy star turns 40 on Oct. 16.
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Beverley Mitchell
The 7th Heaven star turned 40 on Jan. 22.
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