Sienna Miller to move in with married lover Balthazar Getty

Her love life has been super messy in the past so you’d think Sienna Miller would take it slowly with her new bloke.

But no, she’s about to move in with father-of-four Balthazar Getty - just a few weeks after dumping Rhys Ifans.

Sienna has already become a familiar fixture among the plush furnishings of Balti’s LA mansion.

And when the actor - who is heir to a mindboggling £25billion fortune - invited her to move in after a holiday in Italy, romantic Sienna already had her toothbrush ready.

A source said: “Before they went on holiday Sienna was staying over at Balti’s place all the time.

His wife and four children had moved out so they took full advantage.

Sienna told a few friends that Balti had made some noises about moving in. Then during the holiday their feelings for each other got stronger.

“She doesn’t really want to move into the family home because of all the history with his ex wife, so they are planning to buy somewhere new. But her friends are worried she’s rushing into it.”

We bet they are. Sienna, 26, returned to London yesterday, while Balti, 33, stayed on in Italy for his son Cassius’s eighth birthday.

Her ex Rhys was keen for her to return - only because thoughtful Sienna changed the locks to her flat before her holiday.

A source said: “Rhys left a load of clothes, books and things at her place but had to wait until she got back to get them. The last thing he wanted to do is see Sienna. Those pics of her on holiday with Getty really stuck the knife in.”