Olivia Wilde, Jason Sudeikis Expecting First Child

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

A spokesperson for the Rush actress has confirmed to People that Wilde is pregnant, with a source close to the couple stating: "They are incredibly happy. They're very excited to welcome a new member into their family."

Olivia herself later took to Twitter to comment on the news, writing: "WOW. You guys are awesome. So kind. Thank you thank you thank you! PS. Babies eat mostly salsa right?"

WOW. You guys are awesome. So kind. Thank you thank you thank you! PS. Babies eat mostly salsa right?

— olivia wilde (@oliviawilde) October 28, 2013

The 29-year old - who became engaged to the former Saturday Night Live star in January this year - previously told Marie Claire magazine that she was keen to have a big family.

Wilde revealed: "I’m open-minded about how many, but three, which I love, is like a little party. I am not trying to have kids now – there's no strict plan for anything in my life."

Speaking of Sudeikis, Olivia added: "What happens, happens. He's so good with kids ... I've never before experienced looking at someone and thinking, “That's who I want to raise a child with.”’

Congratulations!