Olivia Wilde and her fiancé Jason Sudeikis are expecting their first child.

The House actress's spokesperson confirmed the news that she is pregnant with their first baby, according to People.

A source told the publication: “They are incredibly happy. They’re very excited to welcome a new member into their family.”

Wilde and Sudeikis met on Saturday Night Live in 2011 and began dating six months later. Sudeikis popped the question in January 2013, but a date for their wedding has not yet been set.

Rush star Wilde tweeted at the time: "Thanks for all the sweet congratulatory love, friends! And may I compliment your savvy use of that nifty engagement ring emoticon."

She recently insisted that she is in no rush to marry the actor, saying: "I think being engaged is really fun and I am in no rush. I think it's really wonderful, I feel really lucky and happy."