Kate Winslet has made her first public appearance with her new boyfriend.

The 34-year-old actress - who separated from her film director husband Sam Mendes in March - was accompanied by male model Louis Dowler, also 34, on the red carpet of a Vanity Fair party in Madrid, Spain, on Monday (20.09.10).

An onlooker said: "The chemistry between them looks fantastic. They seemed to want the world to know how great things are."

Things are seemingly going so well between the pair - who started dating in July - Kate has reportedly asked Louis to live with her while she films new movie 'Contagion' in Chicago, because she doesn't want to have a long distance relationship.

A friend said: "They have discussed the idea of Louis going with her while she films so they won't have to endure a long-distance relationship at such an early stage in what seems to be something pretty serious. Kate hasn't been this happy in a very long time."

The British screen beauty currently lives in New York's Greenwich Village with her two children, six-year-old son Joe, whose father is Sam, and her nine-year-old daughter Mia from her relationship with ex-husband Jim Threapleton.