United Kingdom, March 20 -- Benny Blanco knew he'd "have a baby" with Selena Gomez after their first kiss.

The 37-year-old producer - who proposed to the 'Only Murders In The Building' star late last year - has revealed his immediate thoughts after they locked lips for the first time.

Appearing on Spotify's 'Countdown To' series, he said: "I knew right after we kissed, I was like, 'Oh wow. I'm probably going to marry this person'.

"Well, I didn't say marry but I was like, 'I'm probably going to have a baby with this person.' "

The 32-year-old actress and singer held her hand to her face, and said it was "so cute".

Benny also admitted he didn't even know their first date was actually a date, while he revealed a message Selena sent him...