It's a girl!

Olivia Wilde and Jason Sudeikis have welcomed their second child — a daughter — and the little one already has perfect timing.

"There goes the neighborhood," Olivia wrote on Instagram, announcing the arrival of their baby girl, who was born on October 11. "Daisy Josephine Sudeikis. Born, like a boss, on #internationaldayofthegirl."

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The couple, who have been engaged since 2013 and are already parents to son Otis, 2, proudly announced they were expecting earlier this year with a sweet photo of the soon-to-be big brother showing off his "matching baby bump" with Olivia.

Now, the couple are expanding upon their brood, and have always expressed their desire for more kids.

"I’m desperate for more [kids],” Olivia said. "I love my siblings so much and Jason has incredible siblings too. The more the merrier!"

Now with two little ones at home, the party is just beginning.

Congratulations to the family!