Paris Hilton and Nicole Richie are planning to marry their boyfriends in a double wedding, it has been claimed.

Richie and boyfriend Joel Madden have a 3-month-old daughter, Harlow, and have been dating since December 2006. Richie, 26, is said to have introduced Hilton to Joel’s twin brother and Good Charlotte band mate Benji Madden.

Paris, 27, and Benji, 28, hit it off and went public with their relationship in February. She recently accompanied Madden, and his band on their European tour.

Sources claim Hilton and Richie are planning the double wedding to “make millions” from all of the publicity.

“[Paris] is doing it all for attention, as usual. It’s a publicity stunt, just like everything else,” a source close to Hilton says.