Leonardo DiCaprio in 'Boogie Nights' and 14 Other Roles Stars Switched Lower

Stars spread roles constantly -- it's area of the movie business. Take Leonardo DiCaprio. His enormous box-office potential makes him probably the most searched for-after stars on the planet. As a result, he's been offered the chance to experience numerous large-time figures, a couple of which he's needed to turn lower. (Not infamous FBI director J. Edgar Hoover in Clint Eastwood's 'J. Edgar,' which opened up now.) In recognition of DiCaprio and the Hollywood brethren, let us have a look back at a few of the greatest roles stars have ever switched lower. 15 Roles Stars Switched Lower Leonardo DiCaprio in 'Boogie Nights'Will Cruz in 'The Matrix'John Travolta in 'Forrest Gump'Mel Gibson in 'Gladiator'Michelle Pfeiffer and Jodie Promote in 'Thelma & Louise'Tom Cruise in 'Footloose'Matt Damon in 'Avatar'Madonna in 'Casino'Freddie Prinze Junior. in 'Spider-Guy'Jack Nicholson in 'The Godfather'Tom Selleck in 'Raiders from the Lost Ark'Alec Baldwin in 'The Fugitive'Molly Ringwald in 'Pretty Lady'Steve McQueen in 'Dirty Harry'Leonardo DiCaprio in 'American Psycho' See All Moviefone Art galleries » [Photo: FilmMagic / Everett Collection] Follow Moviefone on Twitter Like Moviefone on Facebook