Is Gwyneth already Mrs Martin?

Gwyneth Paltrow showed off two rings at the premiere of her new film, prompting speculation she has secretly married her Coldplay boyfriend Chris Martin.

The American actress wore two rings - one with diamonds, the other a plain band - on her ring finger to the premiere of Sylvia last night.

Martin shunned the MTV Music Awards in Edinburgh to be with Paltrow in London. His band collected the Best Group award.

Dressed in a Valentino gown, Paltrow mingled with fans and posed for photographs for 45 minutes while Martin waited in a Land Rover. But the 31-year-old was coy when asked if wedding congratulations were in order. She said: "They are friendship rings from Hawaii - it's personal."

Her comments will fuel speculation that the couple secretly married in Hawaii in May. The pair, who live in Belgravia, are notoriously secretive about their relationship. However, 26-year-old Martin said recently: "We are not getting married. Certainly no marriage is happening in the near future."

But those comments do not rule out that a wedding has already happened. Martin, who arrived at the premiere with two of his bandmates, said: "It's great, it's the best film ever. And obviously, I think she's the best actress ever."

Paltrow returned the compliment, saying: "I'm a very lucky girl." She is not the first celebrity to wear a so-called "friendship ring" - Jennifer Aniston also wore one after secretly becoming engaged to Brad Pitt.