They join a long list of celebs - including Halle Berry, Matthew Fox, Colin Farrell, Nicole Kidman, Julia Roberts and Jennifer Aniston - already billed to give out gongs at the star-studded ceremony.
Ricky Gervais has previously been announced as the host of the awards, which take place in LA on January 17.
Robert De Niro and Leonardo DiCaprio will presenting the Cecil B DeMille Award to filmmaker Martin Scorsese for his "outstanding contribution to the entertainment field".
"I'm most looking forward to sharing the stage with Leonardo DiCaprio, Robert De Niro and Martin Scorsese," Gervais has said.
"Who'd have thought it. The biggest heartthrob, greatest actor and best director in the world ... and those three, all in one place."






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