Declan Donnelly and Ali Astall have confirmed their baby is due in September.
The "Britain's Got Talent" co-host admitted he and his wife are "very excited" about becoming parents, and they "can't wait" to meet their little one.
He said: "I just wish it would come out now, that we could fast-forward to having the baby.
"We want to get on with it - we can't wait."
Dec and Ali partied at the Virgin TV British Academy Television Awards at London's Royal Festival Hall on Sunday night (13.05.18) to toast Britain's Got Talent's success after the show took home the Entertainment Programme accolade.
But the celebrity talent manager admitted she was "so tired" around midnight and had to take her hubby home.
Speaking to the Daily Mirror newspaper, she said: "Look, I've still got my heels on.
"I'm so tired - I need to get him home now."
Dec took to the stage with "BGT" judges Amanda Holden and Alesha Dixon to collect the prize, but his co-presenter Ant McPartlin was not in attendance at the ceremony, just weeks after he admitted to having "alcohol and emotional issues" after being convicted of drink-driving.
Ant will not be co-hosting the programme's live shows with Dec, and Amanda admitted he will be "missed", but hinted she could co-present some of the segments with the "I'm A Celebrity... Get Me Out Of Here!" frontman.
Speaking to BANG Showbiz backstage at the TV BAFTAs, she said: "I think he will be missed but I think Dec will do a sterling job.
"Alesha and I are on hand to step in.
"Mand and Dec has a good ring to it actually."
"BGT" beat off competition from "Ant and Dec's Saturday Night Takeaway" to scoop the gong.