Who played Jack Dawson in 'Titanic' (1997)?

Who played Batman in 'The Dark Knight' (2008)? Who played Batman in Tim Burton's 'Batman' (1989)? Who played Neo in 'The Matrix' (1999)? Who played Morpheus in 'The Matrix' (1999)? Who played Rose in 'Titanic' (1997)? Who played Maverick in 'Top Gun' (1986)? Who played Iceman in 'Top Gun' (1986)? Who played Marty McFly in 'Back to the Future'?