ROLLING STONES MICK JAGGER and Keith Richards have a new collaboration to be proud of - their children have embarked on a romance.

JAMES JAGGER, 17, and Alexandra Richards, 16, have recently taken a shine to each other and have decided to start dating.

A source tells American magazine US WEEKLY, "They've known each other for most of their lives. But when they just visited their fathers out on tour, they really hit it off."

Sparks were still flying when the teens recently posed together for a Tommy Hilfiger fragrance shoot.

The source adds, "There was heavy flirtation and they were pretty chummy."