If your birthday is in August, welcome to this star-studded party.

Aquaman puts on a party hat along with Demián Bichir and rapper Coolio.

Parker shares her birthday with funny man Kevin Smith and singer Charli XCX.

The supermodel isn't the only beautiful star celebrating today. Evangeline Lilly and Tom Brady were born on August 3, too.

The Riverdale stud shares his cake with a few notable celebs: Meghan Markle, Abigail Spencer, and his twin brother, Dylan.

The Grey's Anatomy actor blows out his candles on August 5, along with Maureen McCormick.

George celebrates her birthday the same day as some other fabulous females, including Vera Farmiga, Michelle Yeoh and Merrin Dungey.

Theron gets her presents on the same day as X-Files star David Duchovny.

Talk about a talent-filled birthday. Mendes shares his day with Meagan Good, Dustin Hoffman, Peyton List and J.C. Chasez.

Aca believe it. Anna Kendrick turns one year older on the same day as American Gods star Gillian Anderson.

The Leftovers star has some fun birthday buddies: actors JoAnna Garcia Swisher, Antonio Banderas, Ryan Eggold, Angie Harmon and Vincent Rodriguez III.

Who else blows out candles on the same day as this superhero? How To Get Away With Murder's Viola Davis.

The model and actress unwraps her gifts on the same day as Peter Krause.

John Slattery and Debi Mazar turn a year older on the same day as this Captain America sidekick.

The actress joins Halle Berry and Steve Martin on the August 14 birthday train.

Several celebrities age up on the same day as the Will & Grace star. Her birthday buds include Jennifer Lawrence, Ben Affleck and Joe Jonas.

This American Horror Story actress isn't the only August 16 baby to make a name for herself. Steve Carell, Cameron Monaghan, Rumer Willis and Madonna share this birthday, too.

The Shannara Chronicles lead was born on the same day as Taissa Farmiga, Robert DeNiro and Sean Penn.

The Mick star shares her birthday with some very handsome men, including Edward Norton, Christian Slater and Andy Samberg.

Stamos can also invite Matthew Perry, Kyra Sedgwick, Erika Christensen, and Peter Gallagher to his birthday party.

The songstress dances the night away with birthday buddies Amy Adams, Andrew Garfield, Ray Wise, Meghan Ory and Ben Barnes.

This Twin Peaks actress sings "Happy Birthday" with Hayden Panettiere and Carrie-Ann Moss.

The Westworld actor is in good company. Kristen Wiig, Richard Armitage and James Corden also celebrate on August 22.

The Broadway and Girls superstar shares his special day with former Laker Kobe Bryant.

Is the One Tree Hill alum alone on his special day? No way! Rupert Grint, Dave Chappelle and Ava DuVernay were also born on this day.

This Gossip Girl throws a party and invites birthday buddies Alexander Skarsgard, Rachel Bilson, Blair Underwood and Claudia Schiffer.

Captain Kirk rings in his birthday with Dylan O'Brien, Melissa McCarthy, Amanda Schull and Keke Palmer.

The Path's lead actor turns a year older on the same day as Blake Jenner, Patrick Adams and Tom Ford.

The songstress rings in her birthday with another country music legend: Shania Twain.

The Scream Queens alum sings "Happy Birthday" with former One Direction member Liam Payne.

Diaz celebrates on the same day as Quantico actress Johanna Braddy and former tennis star Andy Roddick.

Other celebs partying the same day as this Grey's Anatomy alum are Richard Gere and Chris Tucker.