McConaughey, star of such films as “Ghosts of Girlfriends Past” and “The Lincoln Lawyer,” posted a picture of him and Alves 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. They have two children, Levi, 3, and Vida, who turns 2 next month.