The comedian , who is engaged to Laura Gallacher, is said to have revealed the happy news on stage at Nottingham Playhouse and social media users have started to tweet their congratulations.
Fan Daniel Crann, 29, exclusively told Mirror Celeb: “He didn’t confirm if it was a girl or a boy.
“He was conscious of the clock and made sure he was off stage by just approaching 9pm as he ‘needed to get down the f***ing M21 as my girlfriend has just had a baby’.”
Mirror Celeb has reached out to Russell and Laura’s reps for comment
Although the sex of the baby is yet to be confirmed, one fan wrote: “@ rustyrockets I hear you have a baby girl. Many congratulations to you and Laura!! x”
@christ1na19 sadly he didn’t give any more information than he’s girlfriend has just had a baby
— Russellbrand-fancast (@Rbrandfancast) November 7, 2016
A second added: “Congratulations @ rustyrockets, Laura & Mummyrusty on the birth of the new baby Rusty # daddyrussell.”