Declan Donnelly and Ali Astall wasted no time at all getting their sex life back on track after she welcomed their first child into the world.

Declan Donnelly and Ali Astall

Declan Donnelly and Ali Astall

That's according to 'Britain's Got More Talent' host Stephen Mulhern, who claims Dec told him he was planning to get "back on the game straight away" after the couple welcomed daughter Isla last September.

Stephen said: "I was asking him questions: 'Have you changed the nappy yet? How long before you get back to a bit of nookie?'

"Do you know what he said to that? 'As soon as possible -- you've got to get back on the game straight away!' "

Stephen often plays fun games with 'Britain's Got Talent' co-hosts Dec and Ant McPartlin on the spin-off show - and to ensure Dec didn't miss his daughter too much, he instructs the 'I'm A Celebrity... Get Me Out Of Here!' presenter to put a nappy on co-presenter Ant to test his skills in an upcoming 'BGMT' episode.

He told The Sun newspaper's Bizarre column: "Dec's just had a baby so I thought, 'Why don't I dress up as a baby?'

"The outfit looked great and I went in with one of these virtual babies which didn't stop crying.

"Then we got a man-sized nappy, and made him put it on Ant to show us his nappy-changing skills.

"So Dec put a nappy on Ant and, I've got to be honest, he was actually really good at it."

Dec confirmed on September 1st that he and Ali had welcomed their first child.

He wrote on Twitter: "Ali and I are thrilled to announce the arrival of our baby girl, Isla Elizabeth Anne, who was born just after 9 o'clock this morning. Mother and daughter both doing well, Dad is head over heels! D x (sic)"