Adam Sandler's going to be a big daddy.

The comedian, 41, announced on Wednesday's Tonight Show With Jay Leno that he and his wife Jackie are expecting their second child.

She is three-and-a-half months pregnant.

Sandler joked that his wife has been suffering "all day" from morning sickness.

"In the beginning, I would rub her back and go, 'It's worth it. We're going to have another beautiful baby, I love you, thanks for doing this,'" he said.

Their daughter Sadie is 2.

Of being a dad, Sandler has said, "It’s a lot of fun.

"You know what is surprising? That the kid looks through me. The kid... there’s no focus... Every time I think the kid likes me I’m like, ‘Oh, she’s staring at my forehead right now.'"