DiCaprio, 39, said Luhrmann's enthusiasm inspires him to give out his best, reported Contactmusic.
"I've known Baz ever since we started rehearsals for 'Romeo + Juliet'. I've always been inspired by his enthusiasm. He's not afraid to flip it on its side and reinvent the genre, yet at the same time retain the sort of intimate power of the words of the great powers," he said.
"Baz also infused hip-hop and all kinds of other different elements to connect with a modern day audience.