Sienna Miller is suing the bosses of two British tabloids and a photo agency after they released a series of sexy pictures of the star with married actor Balthazar Getty.

Miller is targetting News International, the company that owns the News of the World and The Sun, and Big Pictures in legal papers filed at London’s High Court earlier this week.

The Alfie star claims her privacy was breached after photos of the pair frolicking on a yacht off Italy’s Amalfi coast earlier this month were published by the papers – just days after Getty denied he was romantically involved with Miller.

But the actress’ lawyer Mark Thomson is refusing to divulge further information about the suits, saying: “Neither I nor my client will be commenting further.”

On Monday, Getty finally confirmed reports he has split from his wife amid rumours of his affair with Miller.

In an admission prompted by the photos, he said: “In light of the fact that many pictures have surfaced in print and on the internet which has caused myself and my family great embarrassment, I felt it necessary to at least acknowledge publicly that, yes indeed my wife and I have separated and I will not be commenting any further.”

Miller won a $65,000 payout in a separate case from the same two newspapers in December, after they published “intrusive” photos of the star.