Though being part of the "regular" cast, neither Jimmy Cooper (Tate Donovan) or Luke Ward (Chris Carmack) are in every episode, whereas Summer Roberts (Rachel Bilson), who was billed as a guest star for the first half of season one has been in every episode. Due to labor union salary rules about filming outside of Los Angeles County, the show is actually filmed at Raleigh Studios in Manhattan Beach (40 miles away from the actual Newport Beach) to reduce filming costs. The Cohen's ...[Read Story ]