Sienna Miller has been photographed sunbathing topless on the beach with her new main man, model Jamie Burke, about three weeks ago in Tulum, Mexico.

The young pair were seen kissing and cuddling up during a vacation on the coast of Mexico, confirming rumors they are an item.

An onlooker said, “They were like a couple of love-struck teenagers.”

Sienna, 25, and Jamie, 21 met at a party to celebrate her latest film Factory Girl at a New York hotel at the beginning of February.