What you might not know about the American author
Mr. Worldwide hit the benchmark birthday on January 15.
The singer's hubby Swizz Beats paid her a beautiful birthday tribute on January 25.
Rowland's birthday is on February 11, and she's not the only former Destiny's Child member hitting 40!
Hitting 40 on February 17? That's hot!
The 'Orange Is the New Black' actress celebrates her birthday on February 10.
Timberlake is bringing sexy back to 40 on January 31.
The ‘Lord of the Rings’ star embarked on another adventure around the sun on January 28.
The actor has a long and varied career to celebrate on February 17.
The trickster hero turns 40 on February 9.
The singer might have to serenade himself on February 27 if COVID-19 restrictions are in place.
The actor and singer, known for voicing Olaf in 'Frozen,' celebrates his birthday on February 23.
Stiles marks the second actor from ‘10 Things I Hate About You’ to turn 40 this year (after Joseph Gordon-Levitt). Her birthday is on March 28.
The 'Jurassic Park' actress reaches her milestone on March 2.
The force of forties will be with him on April 19.
Here's hoping Schumer finds new things to poke fun at in her forties, which start on June 1.
Girl meets 40 on May 5!
The actor doesn't look it, but he'll be 40 years old on May 12.
The Brazilian supermodel will officially be raising the bar ridiculously high for 40-year-olds on April 11.
Another '10 Things I Hate About You' actress turns 40, but this one's on June 7!
Captain America steps into his distinguished forties on June 13.
The actor, also known as Lady Gaga’s ex-fiancé, hits 40 on July 15.
The Duchess of Sussex is scheduled for a royally good time on August 4.
The 'Grey's Anatomy' star hits 40 on August 5.
The Swiss tennis icon turns 40 on August 8, and he's not giving up on the game, even after two knee surgeries!
The 'Hamilton' star marks four decades on August 6.
On August 27, Adams will be the second 'Suits' actor to turn 40 this year (following his co-star Meghan Markle).
Every day is Bey-Day, but September 4 is officially Queen Bey's B-Day.
Summer from 'The O.C.' somehow turns 40 on August 25!
For 28 years in the film industry, 40 seems young! Portman reaches her milestone, somehow still with a level head, on June 9.
Just like her 'The Simple Life' co-star Paris Hilton, Richie hits 40 this year, on September 21.
On September 12 people should probably ask Hudson to sing her own 'Happy Birthday' song because her voice is incomparable!
The legendary tennis star has lost none of her fire as she steps into her 40th year on September 26.
This one is a blow for anyone who remembers her on 'Gilmore Girls.' Little Rory turns 40 on September 16.
The hilarious 'Saturday Night Live' star turns 40 on November 14.
Oops! Another year did it again. The pop icon turns 40 on December 2.
The 'This Is Us' actress celebrates her birthday on November 11.
Jessica Jones is ready to kick some more butt in her forties, which start on December 16.
On August 24, the ‘One Tree Hill’ star will inevitably get a year older.
Rounding off the list is Sienna Miller, who will hopefully have some 'Layer Cake' on December 28.
See also: Astrological predictions for 2021
As the years keep flying by, all our numbers tick higher and higher, but we spend far too much time worrying about all that. In your twenties, you get to build yourself up with whatever you can grab, and then your thirties are all about refining everything you've accumulated, so that in your forties you have truly taken shape—and you still have tons of energy to spare!
Since 50 is apparently the new 30, turning 40 is nothing to be scared of. Unless, of course, you're watching the actors from your favorite teen flicks and the singers who soundtracked your youthful memories hit 40 when you were least expecting it. Like this year!
Click through to see the celebrities turning 40 in 2021.
The actress, entrepreneur, and mom will hit 40 on April 28.
40 celebs turning 40 this year
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CELEBRITY Birthdays
As the years keep flying by, all our numbers tick higher and higher, but we spend far too much time worrying about all that. In your twenties, you get to build yourself up with whatever you can grab, and then your thirties are all about refining everything you've accumulated, so that in your forties you have truly taken shape—and you still have tons of energy to spare!
Since 50 is apparently the new 30, turning 40 is nothing to be scared of. Unless, of course, you're watching the actors from your favorite teen flicks and the singers who soundtracked your youthful memories hit 40 when you were least expecting it. Like this year!
Click through to see the celebrities turning 40 in 2021.