Olivia Wilde and Jason Sudeikis welcome a baby boy

It's a boy! Olivia Wilde, 30, and Jason Sudeikis, 38, have welcomed their first child.

And the baby's name is...Otis Alexander Sudeikis. 

Funny Olivia announced the big news on Twitter earlier this evening (Wednesday, April 23) by sharing this sweet photo of herself and baby Otis...

“Ladies and gentlemen, Otis Alexander Sudeikis has LEFT the building! (I’m the building),” she captioned the pic. Ha! Olivia's great on Twitter.

Olivia and former Saturday Night Live star Jason got engaged in January 2013 and went public with their pregnancy news back in October—we've been loving Olivia's sporty maternity style and witty social media posts every since. The cute couple are getting set to costar in a romantic comedy, Relanxious. 

Read more: Hollywood's funniest parents>

Well, that pregnancy went fast, didn't it? (Some celeb pregnancies seem to go on and on—remember Fergie's never-ending pregnancy, and Jessica Simpson's?) Off to update our Who's Pregnant in Hollywood gallery. See you there!

Congrats to the family!

Love! xo Haley-O Celebrity Candy: Follow along as Haley Overland delivers the latest scoop on celebrity families—plus sweet celeb interviews! You can’t have too much of this candy, so check back often.