Summary:
The US actress Olivia Wilde has announced she is expecting her third child with husband-to-be Otis Alexander Sudeikis.

Full article:
(CNN) -- Actress Olivia Wilde proudly announced the birth of her baby boy on Wednesday, tweeting a photo to share the news with her fans. "Ladies and gentlemen, Otis Alexander Sudeikis has LEFT the building! (I'm the building)," she wrote. The photo posted by the 30-year-old actress shows her smiling, with the baby's head pressed against her cheek. Wilde and former "Saturday Night Live" star Jason Sudeikis welcomed their newborn on April 20, a representative for Wilde said. The couple announced their engagement last year and revealed in October that they were expecting their first child together. "We've discussed all our ideals and hopes. I can't wait for children," the "Rush" star told Marie Claire last year. "I'm open-minded about how many, but three, which I love, is like a little party. ... (T)here's no strict plan for anything in my life. What happens, happens." But even then Wilde said she knew her husband-to-be would make a great dad. "He's so good with kids," she told the magazine of Sudeikis, 38. "I've never before experienced looking at someone and thinking, 'That's who I want to raise a child with.' " CNN's Breeanna Hare and Jane Caffrey contributed to this report.