Matt Damon's grey hair thanks to kids

London, Feb 13 (IANS) Actor Matt Damon, 43, believes that being a father of four has left his hair prematurely grey.

"The Bourne Identity" star is father to four girls with his wife Luciana, including her daughter Alexia, from a previous marriage.

"I have grey hair. I've four kids now and man did my hair go grey quickly," Damon told Britain's Channel 4 News, reports contactmusic.com.