Actress Julia Roberts is co-hosting “The Ellen DeGeneres Show” Wednesday (Dec. 18), so be sure to tune in. Above is a sneak peek of the episode, where Roberts addresses the tabloid rumors that she’s pregnant again.

Ellen says, “I was in the hair salon the other day and I saw that Portia and I have marital problems. … It was hilarious, it was like ‘marriage crumbles’ and then you’re pregnant, did you know that?”

“Somebody get my husband on the phone! This is no way for him to find out,” jokes Roberts. “I’m not pregnant. Half the people in the audience are like, ‘Is that? Should we be [claps]?'”

But she insists she’s good with the three kids she already has.