Holby City star Tina Hobley is going to use her own baby to play her son in the hit TV medical drama.

The 38-year-old actress had been filming scenes with another baby, after her character, feisty ward sister Chrissie Williams, gave birth.

But the mother of three told TV Times that she now wants to use her real son, Orson, who was born in March.

After using another baby on set, she said: “I thought ‘This feels a bit weird, why don’t I have my own baby?’. So we’re going to do that.”

Tina, who recently returned to the BBC One show after four months on maternity leave, said: “Orson won’t be working hard – he’ll be on screen perhaps twice a year.”

She said that her son looked “exactly like” her and added: “I think it’s quite a cool thing to appear with him. I thought it would be something nice to have when I’m old and grey.”

The actress, who married PR director Oliver Wheeler in 2006, also has two daughters: Olivia, two, and – from her first marriage to Steve Wallington – Isabella, 11.

Tina returned to work just nine weeks after Olivia was born, but said later that she had vowed not to do the same again with her third child.

“It was too early. Your body isn’t recovered and your hormones are all over the place,” she said at the time.

“I didn’t want to leave Olivia. But work were very understanding. They built another break into the storyline and I had another three months off.”