Jimmy Kimmel, Molly McNearney Jimmy Kimmel, Molly McNearney

Jimmy Kimmel and his wife Molly McNearney are expecting their first child together, he announced on an upcoming episode of The Ellen DeGeneres Show, which will air Wednesday.

Which celebrity is older?

This is McNearney's first child and Kimmel's third. The Jimmy Kimmel Live host has two kids, Kevin, 20, and Katie, 22, from his first marriage. Kimmel and McNearney, the co-head writer of his late-night show, married in July 2013 after four years together.

"I've really forgotten everything. It's funny because I was with [John Krasinski and Emily Blunt], who just had a baby and I was like, 'Oh yeah, and there's new ways to do things,'" Kimmel, 46, told DeGeneres of raising children. "I told my daughter, 'Listen, there's only so much love I have to give — you're going to have to split it up with the new kid. There's a finite amount of love and that's that.' So they're dealing with it, but it is very weird at my age. I'm going to be one of those old dads."