Alec Baldwin's new wife has sparked rumours she is pregnant.

The actor tied the knot with yoga teacher Hilaria Thomas in July. The newlyweds attended a benefit in New York over the weekend and guests apparently spotted Hilaria sporting what appeared to be a baby bump.

Although Alec gave a rousing speech at the event, all eyes were reportedly on Hilaria's stomach.

"She's not overeating, she's infanticipating!" one Hamptons insider told the New York Post.

The rumour mill went into overdrive when the beautiful brunette refused alcohol, but it has been claimed she didn't want to drink because she was battling a cold.

A close friend insists Hilaria is not pregnant.

"These rumours have gone on so long that if they were true, Hilaria would have had a baby already. They just got married, give them some time," the source explained.

A representative has not commented on the pregnancy reports.

Alec has made no secret of his desire to have children with Hilaria. He has revealed that he wants a large brood with his new wife.

"My only dream is that they look like her," he recently gushed.

Alec and Hilaria began dating last summer and got engaged in April.