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Carson Daly

AP Photo/Phil McCarten

Carson Daly has another reason to be staying up late...diaper duty.

The 35-year-old Last Call host and girlfriend Siri Pinter are expecting their first child together, E! News has learned.

"They're both thrilled," says rep Heather Lylis. "He's always wanted to be a dad and he's excited about the holidays and spending them together with family and friends."

Daly's lady love, an NBC producer who has worked on Last Call (natch) and Last Comic Standing, is about midway to term, and the child is due in the early spring. The couple have been dating a little over a year.

Until then, Daly will continue to lord over his late-night gabfest. The former TRL ringmaster will also return to host the Peacock's New Year's Eve with Carson Daly.