Diane Ladd, who received an Academy Award nomination for her portrayal of Flo in the film version joined the cast in 1980 as Isabelle "Belle" Dupree, a hard-edged but kind-hearted woman. She had been a waitress of Mel's in the past, during which the two had a romantic relationship. Despite Ladd's Golden Globe- performance as Belle, the character was not retained for the duration of the series and was replaced early in 1981, the character making one last appearance in which she telephones the diner to inform everyone that she had taken a job as a backup singer in Nashville, Tennessee. It has been said that Ladd clashed with her co-stars, and no flashbacks including Belle were shown during the series' final episode.