Bob & Carol & Ted & Alice (1969)
Academy Award for Best Supporting Actor (Elliott Gould)
Academy Award for Best Supporting Actress (Dyan Cannon)
Academy Award for Best Writing, Original Screenplay (Paul Mazursky, Larry Tucker)Award details: (details at IMDb)
Bob and Carol Sanders are best friends with Ted and Alice Henderson. After attending a weekend self-help/ self-discovery getaway, Bob and Carol feel newly enlightened, and want their friends to feel the same way.