Wilde shared the news with her followers via Twitter, with the super cute tweet: "Ladies and gentlemen, Otis Alexander Sudeikis has LEFT the building! (I'm the building)." And she shared an absolutely adorable photo of her with her new son with the announcement, too!
This is the first child for the couple, who became engaged early last year after meeting on the set of Jason's former employer, Saturday Night Live.
What do you think about Otis for a modern-day boy? Get the inside scoop on their cute and classic baby name over at In Name Only.