ENTERTAINMENT
12/15/2010 11:55 am ET | Updated May 25, 2011

Denise Richards Dating Nikki Sixx?

Denise Richards is dating Motley Crue bassist Nikki Sixx, Us Weekly reports.

A source tells the magazine that Denise and Nikki "have been neighbors for years. They have a lot in common and are taking things slowly."

Sunday morning the pair was spotted eating breakfast together at Marmalade Cafe in Calabasas, California.

"Nikki was telling stories, and Denise was laughing," a witness told Us.

Nikki has been married to two Playboy Playmates and dated Kat Von D until early this year, just before she got together with Jesse James. He has struggled with heroin addiction in the past and experienced several near-fatal overdoses.

Denise divorced Charlie Sheen in 2006 then briefly dated Richie Sambora. She plans to spend Christmas with Sheen for the sake of their two young girls.