Olivia Wilde Introduces Her Baby on Instagram (Photo)

AP Images

Everyone, meet Otis.

Nearly three months after Olivia Wilde gave birth to a baby boy, Otis, the actress is finally showing the world her adorable newborn.

In a new Instagram post on Thursday, the actress posted a photo where the little guy is seen peeking out above her shoulder. She added the caption: "Rock and roll, baby." Too cute.

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Wilde, 30, and her fiance, Jason Sudeikis, 38, welcomed their first child in April, when she announced the news via Twitter, writing: "Ladies and gentlemen, Otis Alexander Sudeikis has LEFT the building! (I'm the building)."

Check out the sweet photo below. (Just look at those cheeks!)