blonde coldplay Kate Bosworh green hair concert

Kate Bosworth's new man, director Michael Polish, is sexy ... however the green hair tips, not so much.

The 28-year-old actress, who recently broke up with True Blood's Alexander Skarsgard, was all smiles at Wednesday night's Coldplay concert at the Los Angeles Tennis Center at UCLA.

But what's with the green streaks? Guess Mr. Polish is a fan! Turns out Kate's new beau is directing her in the upcoming movie Big Sur based on a Jack Kerouac novel.

See more of Kate and her new look ... after the jump.