By Archana Ram
Updated December 26, 2010 at 03:18 PM EST

Hugh Hefner, 84, proposed to girlfriend and playmate Crystal Harris, 24, last night in L.A., the Playboy magnate tweeted. This will be the third marriage for Hefner. In more Hollywood engagement news, Ginnifer Goodwin is set to marry boyfriend of two years Joey Kern, who proposed to the Big Love star earlier this month.