Sheridan Smith has said that researching her ancestors on Who Do You Think You Are? made her want to have a baby.

The actress, who is about to star as Cilla Black in new ITV drama Cilla, took part in the BBC’s family tree programme to find out about her relatives’ musical past.

According to the Daily Mirror, she said: “I maybe want to have a baby of my own. I’m maybe feeling a little bit broody right now. But don’t tell anyone because it will ruin my street cred.”

Sheridan found out about her great great grandfather Benjamin Doubleday, who was a hugely successful banjo player performing to sold out venues.

She said: “I’m so proud of how talented he was. This link is so special to me.”

Benjamin eventually lost all his money when he put everything into his biggest ever show, which was a flop and which led to his wife leaving, taking their four children with her.

An emotional Sheridan said: “I did not see any of this coming. It’s like it was a curse. It’s heartbreaking. I didn’t expect to have such a reaction and to feel so immediately attached, but he’s the reason I’m here.”

Benjamin was reunited with two of his daughters before his death, and they set up a banjo trio together.

Sheridan said she had started learning the banjo herself: “I feel like I want to learn to play, I feel like I have to. It’s almost compulsory now. The gene has been passed down through my great great grandfather.

“It’s made me want to learn to play all sorts of instruments – and maybe have a baby of my own.”