Actor Dennis Quaid\'s third wife has filed for divorce, saying the couple\'s seven-year marriage has \"become insupportable because of discord or conflict of personalities\". Kimberly Buffington Quaid filed a petition this month in Travis County, Texas, using the initials \"B.K.\" and identifying Quaid as \"W.D.\" But representatives for Quaid confirmed the split, saying a \"satisfactory settlement is being worked out for both parties\". The divorce papers filed on March 2 were first reported on Friday by celebrity website TMZ. The couple has twins Zoe and Thomas, born in 2007. Quaid previously married and divorced actresses P.J. Soles and Meg Ryan.