Rocker/actor Jared Leto has sparked rumors of a romance with Adrian Grenier's ex Isabel Lucas after they were spotted shopping together in California.

At 24, Aussie actress Lucas is 13 years Leto's junior - but the age gap doesn't appear to have stopped them from embarking on a relationship. The couple was photographed out in Malibu together on March 1st shopping for groceries.

Leto's past lovers have included Cameron Diaz, while Lucas split from Entourage star Grenier last August, shortly after she was involved in a car crash which almost cost her friend Shia LaBeouf his hand.

The actress was a passenger in the Transformers star's truck when he flipped it over after colliding with another motorist in Hollywood.

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(This news article provided by World Entertainment News Network)