Keira Knightley and Mark Ruffalo's on-set smooch

Keira Knightley has been pictured kissing Mark Ruffolo, but no need to worry its for their new film

When we spied Keira Knightley smooching Mark Ruffolo in New York, we did wonder what her fiance James Righton would think. But he need't worry - it's all for the British beauty's new film!

The British beauty was seen shooting a kissing scene with co-star Mark for their new film Can A Song Save Your Life? in New York.

CAN A SONG SAVE YOUR LIFE? ON SET PICS

The pair were spotted in a passionate embrace on the streets of the city, with Keira looking lovely in cream trousers and a blue top.

The actress as been shooting the new movie for past three weeks. Also starring Maroon 5 front man Adam Levine, the film revolves around a dejected music business executive forming a bond with a young singer-songwriter new to Manhattan.

Despite her gruelling filming schedule, Keirahas made sure she has found the time to squeeze in a few romantic strolls around the Big Apple with her fiance and Klaxons band member James.

The pair got engaged in May and since then have been virtually inseparable.

Keira's new film is due for release in 2013.

KEIRA KNIGHTLEY AND JAMES RIGHTON TAKE A ROMANTIC STROLL IN NEW YORK

KEIRA KNIGHTLEY ENGAGED TO JAMES RIGHTON

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