By
"Just asked Camila to marry me. Merry Christmas," McConaughey, 42, said in a message posted on Twitter and WhoSay late Sunday. The messages were accompanied by a photograph of the couple kissing in front of a Christmas tree.
Alves, 28, and McConaughey started dating in 2006 and have two children: Levi, age three, and Vida, who turns two next month.
The star of "Lincoln Lawyer" and 2008's "Tropic Thunder" was proclaimed the "sexiest man alive" by People magazine in 2005.