LOS ANGELES (Reuters) - Hollywood leading man Matthew McConaughey has proposed to his long-time girlfriend and the mother of their two children, model Camila Alves, the actor said in a posting on celebrity website Whosay.com McConaughey, star of such films as “Ghosts of Girlfriends Past” and “The Lincoln Lawyer,” posted a picture of him and Alves kissing near a Christmas tree on Sunday with the message “just asked camila to marry me, merry Christmas.” WhoSay.com is a website that hosts many celebrity accounts. A spokesman for the actor confirmed that McConaughey posted the message but gave no further details. McConaughey, 42, and Alves, 28, have been a couple for several years.