The Apple (a.k.a. Star Rock) is a 1979 musical science fiction film starring Catherine Mary Stewart and directed by Menahem Golan. It is a discoesque rock opera-styled feature, set in a futuristic 1994, dealing with themes of conformity versus rebellion and infused with Biblical allegories (namely the tale of Adam and Eve). It is one of the few movie musicals that has not yet been a live musical.

The film was a low budget attempt by the young Cannon studio to capitalize on the success of music-oriented films like Saturday Night Fever and Grease. Set in America but filmed in Germany, it was released in West Germany as Star Rock in 1979. The film was critically panned and a box office bomb when given an extremely limited U.S. release in the fall of 1980 under its current title. It may have underperformed in theaters because of the waning popularity of disco music and its rather campy plotline. However, in later years the film has gone on to enjoy a small cult following.