The weekend wedding celebrations have begun!

PETE WENTZ and ASHLEE SIMPSON enjoyed a traditional wedding rehearsal dinner at big sis' JESSICA SIMPSON's Beverly Hills home on Friday night, People reports. Pete's parents flew in from Chicago to host the cozy, candlelit party, which also saw a handful of friends and family attend.

Those friends included none other than lovebirds NICOLE RICHIE and JOEL MADDEN, according to OK! magazine.

As Ashlee and Pete's big moment draws near, the speculation continues as to whether NFL hunk TONY ROMO will join Jessica at the ceremony. Keep checking back here to find out!