Gabrielle Union suffered major hairloss while filming new comedy Top Five with Chris Rock after having to dye her locks several times.

The Think Like a Man actress plays a blonde reality star in the movie and she admits lightening her hair was not a hit at home when it started coming out in clumps.

She tells the New York Post, "I have dark hair, and the process to get it blonde (for the film) made my hair fall out. Some people gain weight for a role, I practically went bald for a role. I lost so much hair!

"(My husband Dwyane Wade) loved the blonde and thought I looked sexy. But once I went bald, he was like, 'I'm ready for you to go back!'"