Actress Sienna Miller has finally ended all speculation about her new romantic interest, actor Rhys Ifans, by admitting that she is dating him.

The Factory Girl star insisted for months that she and Ifans are just good friends.

However, at the after-show party of her new film ‘Interview,’ the 25-year-old actress introduced the 39-year-old actor as her boyfriend to her pals.

The couple arrived individually at the premiere in London, but were later spotted smooching on the dance floor.

“Sienna kept gazing at him. They were locked in each other’s arms,” The Sun quoted a partygoer, as saying.

In August this year, Miller was snapped topless with Ifans on a beach in Ibiza.