Pals Pamela Anderson and Denise Richards are considering a $1 million offer to pose nude together in an upcoming issue of Playboy magazine. Both blondes have disrobed for the men's magazine in the past, and now Playboy boss Hugh Hefner wants the actresses to team up for a spread in the January 2008 issue of the publication. A source tells the Globe, "Neither Pam nor Denise has committed yet, but they're seriously considering it." Anderson has appeared nude in Playboy a record 12 times, while Richards stripped for the December 2004 issue. The pair became firm friends when they shot mob comedy Blonde & Blonder in Canada last year .