Robert De Niro is considered one of the greatest actors of all time. He has starred in some of the most iconic films ever made, including Taxi Driver, Raging Bull, and Goodfellas. De Niro is known for his intense method acting style, which often means staying in character even when the cameras are not rolling. This can be extremely mentally and emotionally taxing, but it often results in amazing performances. De Niro is also a master of improvisation, which allows him to create truly memorable scenes.