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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