The Hollywood couple welcomed baby daughter Daisy into the world on Tuesday (October 11), which happened to be International Day of the Girl Child - an informal holiday launched by philanthropic organization United Nations Women.
Wilde took to Instagram on Saturday (October 15) to announce the exciting baby news, posting an adorable picture of the newborn and adding the caption: "There goes the neighborhood. Daisy Josephine Sudeikis. Born, like a boss, on #internationaldayofthegirl."
The first precious photo Olivia shared of her and Jason's daughter features the tot sprawled out in the middle of a giant stuffed animal sheep pillow. Baby Daisy is a little sister to the couple's two-year-old son Otis.
Last month, Wilde revealed she was expecting a girl in a politically charged tweet referencing the current U.S. presidential race.
As Democratic candidate Hillary Clinton takes on Republican nominee Donald Trump at the polls to become America's next leader, Olivia made it clear she supports the former First Lady: "As someone who is about to have a daughter, this hits me deep in my core. #NeverTrump," Olivia tweeted in a message that contained a link to a campaign video Clinton shared online.
In the footage, young girls provide sound bites in response to some of the insulting statements Trump has made about women. The video concludes with the question: "Is this the president we want for our daughters?"
Olivia appears to have faced more social struggles in her second pregnancy than in her first - in the weeks preceding her anti-Trump tweet, the movie star shamed subway riders on Twitter for not giving up their seats for her.