Forty and fabulous!

A slew of big stars are celebrating their milestone 40th birthdays this year. From Kate Bosworth's Jan. 2 celebration through Steven Yeun celebrating at the very end of the year, see who will be blowing out the candles in 2023.

Kate Bosworth

On her Jan. 2 birthday, Kate Bosworth's now-husband Justin Long penned a love letter on Instagram, which read in part, "She is my joy. She is my best friend."

Emily Blunt

It was likely not A Quiet Place in Emily Blunt's house when she celebrated her 40th on Feb. 23.

Aziz Ansari

Blunt has a birthday twin in Aziz Ansari, who also celebrated on Feb. 23.

Kate Mara

At 40 — her birthday is Feb. 27 — Kate Mara has husband Jamie Bell and two kids, plus an Emmy nomination under her belt.

Lupita Nyong'o

Oscar winner Lupita Nyong'o blew out the candles on March 1.

Jamie Chung

Dexter: New Blood's Jamie Chung marked the occasion on April 10.

Gugu Mbatha-Raw

Surface's leading lady Gugu Mbatha-Raw marked her milestone birthday on April 21.

Henry Cavill

It's a bird, it's a plane, nope, it's Henry Cavill's birthday cake! The Superman actor was born on May 5.

Greta Gerwig

Director Greta Gerwig's birthday is Aug. 4, and came days after the release of her record-breaking Barbie film.

Dan Levy

Schitt's Creek favorite Dan Levy turned 40 on Aug. 9.

Chris Hemsworth

The gods smiled on Chris Hemsworth this Aug. 11, the Thor star's 40th birthday.

Mila Kunis

Let's hope Bad Moms star Mila Kunis got a good cake on her 40th, Aug. 14.

Andrew Garfield

Spider-Man only gets better with age: franchise star Andrew Garfield turns 40 on Aug. 20.

Donald Glover

A many of many talents, perhaps Donald Glover will have many celebrations for his 40th, Sept. 25.

Tessa Thompson

If her red carpet style is any indication, Tessa Thompson will be rocking something major when she celebrates her milestone on Oct. 3.

Jesse Eisenberg

Fleishman Is in Trouble's Jesse Eisenberg will hopefully not be in trouble when he blows out his candles on Oct. 5.

Adam DeVine

Bumper turns 40! Pitch Perfect star Adam DeVine's birthday is Nov. 7.

Jonah Hill

Nothing Superbad about it: Jonah Hill turns 40 on Dec. 20.

Steven Yeun

Minari's Steven Yeun ends the year in a big way: his birthday is Dec. 21.

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