The Baz Luhrmann-directed film, based on F Scott Fitzgerald's classic novel, sees DiCaprio take on the role of Jay Gatsby. Tobey Maguire plays the part of Nick Carraway, while Carey Mulligan stars as Daisy Buchanan.
The supporting cast also includes Indian cinema icon Amitabh Bachchan as Meyer Wolfsheim, Isla Fisher as Myrtle Wilson and Joel Edgerton as Tom Buchanan.
Mulligan told Digital Spy last year that she "burst into tears" when Luhrmann told her she had won the role of Daisy Buchanan.
The Oscar-nominated actress revealed that she prepared for the role by researching the life of author Fitzgerald and his wife Zelda Fitzgerald.
The Great Gatsby is due to arrive in cinemas on December 26.
Watch Carey Mulligan discuss The Great Gatsby with Digital Spy below: