Murphy marries boyfriend

'Sin City' star Brittany Murphy has wed her screenwriter boyfriend Simon Monjack.

The 29-year-old actress and Monjack were seen wearing wedding rings at a Playboy magazine event at the Kentucky Derby on Saturday.

A source tells UsMagazine.com: "They didn't want photographers to take pictures of their rings because they were waiting to make a formal announcement."

Murphy called off her engagement to ex-boyfriend Joe Macaluso in August 2006, following an eight month relationship. She was also engaged to talent manager Jeff Kwatinetz for six months in 2004.