Great admirer of Marlon Brando and his favorites actors are Al Pacino, Robert De Niro, Johnny Depp, Morgan Freeman, Anthony Hopkins, George Clooney, Robert Downey Jr. Colin Farrell, Jeremy Irons, Bob Odenkirk and Meryl Streep.
You can study your lines all you want; but like Morgan Freeman once said 'I get what I've got out the page but, I can't get what you gonna get me off the page'. Therefore you have to listen to your fellow actor because listening is even more important than being listened to. So you can react, you can connect with the other character and with your own.