He became famous in the 1970s for playing Jodie Dallas on the ABC dramedy , Soap , and became a Hollywood film star during the late 1980s and the 1990s , appearing in the box office successes When Harry Met Sally ... and City Slickers . He gained prominence in the 1970s for playing Jodie Dallas on the ABC sitcom Soap and became a Hollywood film star during the late 1980s and 1990s , appearing in the critical and box office successes When Harry Met Sally ... and City Slickers .