Who played Iceman in 'Top Gun' (1986)?

Who played Morpheus in 'The Matrix' (1999)? Who played Jack Dawson in 'Titanic' (1997)? Who played Rose in 'Titanic' (1997)? Who played Maverick in 'Top Gun' (1986)? Who played Marty McFly in 'Back to the Future'? Who played Doc Brown in 'Back to the Future'? Who played Ferris Bueller in 'Ferris Bueller's Day Off'? Who played Dorothy in 'The Wizard of Oz' (1939)?