Does Sienna have a new love?

Sexy Sienna Miller seems to have found a new man, though we're advising her to tread carefully because of his past history!

According to sources in the US, the Factory Girl star has been spotted with British musician and model Jamie Burke, who has a string of celeb conquests: he's dated Lindsay Lohan and Kate Moss.

Last Saturday, the two stars spent time together at New York's Gramercy Park Hotel.  Sienna has been single since her traumatic split from Jude Law last November.