Jason Sudeikis, Olivia Wilde are "Totally Inseparable"

Olivia Wilde and Jason Sudeikis attend the 2012 Vanity Fair Oscar Party. Credit: Christopher Polk/VF12/WireImage

Joined at the hip!

Olivia Wilde has become a permanent fixture in boyfriend Jason Sudeikis' world. "They are living together now," an insider told Us Weekly of the couple of nine months. "Totally inseparable!"

Sometimes it takes juggling, as when the Saturday Night Live star, 37, made time to see Wilde, 28, on a work night September 20. "Everyone on the show staff was writing late," said a source, "but Jason managed to sneak over to Radio City Music Hall to see Bon Iver with Olivia."

Still, the two are in no rush to wed, said the source.

Sudeikis was previously married to actress and 30 Rock writer Kay Cannon from 2004 to 2010. Wilde finalized her divorce from Tao Ruspoli in September 2011after eight years of marriage.

"They've both been married, so they've already experienced that and know what it entails," the source explained. "It's something for down the road."