Jimmy Kimmel  and Molly McNearney  will be saying "I do" Saturday night.

The Jimmy Kimmel Live host and his comedy writer have taken a large chunk of rooms and suites at the posh Ojai Valley Inn & Spa - about 90 minutes outside of L.A. -- where they're spending the weekend with family and friends.

Ben Affleck, Stanley Tucci  and Howard Stern were among the celebrity guests at Friday night's rehearsal dinner,