Sienna Miller welcomes third child

Sienna Miller has given birth to her third child.

The 44-year-old actress - who has Marlowe, 13, with former partner Tom Sturridge and a two-year-old daughter whose name hasn't been publicly revealed with boyfriend Oli Green - announced late last year that she was expecting another baby and while promoting her latest project, Jack Ryan: Ghost War, she revealed she has welcomed the tot into the world, though she didn't give any further details about the baby.

She told E! News: “It’s happened. I have a tiny baby next door.

“It feels like stringing sentences together is a bit challenging.

“I’m on very little sleep but I’m madly in love with my baby.”

In Jack Ryan: Ghost War, Sienna plays MI6 officer Emma Marlowe and she had a "thrilling" time embracing such a different character to the people she has played before.

She said: “I loved it. I haven’t done anything really like this before and to play someone who is incredibly unapologetic, incredibly tough and bold and brave and pretty funny and dry and very cool—it was thrilling.”

One person who isn't a fan of Sienna's work is her eldest daughter, who she admitted “couldn’t be less interested in my career if I tried.”

But the actress hopes her latest character will win over the teenager.

She said: “I thought people calling me ‘Agent Marlowe’ would hook her. So maybe she’ll finally watch a film of mine.”