"The great difference between screen acting and theatre acting is that screen acting is about reacting - 75% of the time, great screen actors are great reactors"

This quote by Nicolas Roeg talks to the distinctions in between screen acting and theatre performing. Roeg suggests that screen acting is mostly about responding, and that fantastic screen actors are terrific reactors. This indicates that screen performing is more about responding to the other actors and the environment around them, rather than producing a character and delivering a performance. This is in contrast to theatre performing, which is more about developing a character and providing a performance. Roeg's quote suggests that screen performing is more about reacting to the environment and other actors, and that fantastic screen actors are those who can do this effectively. This implies that screen acting requires a various set of abilities than theatre performing, and that great screen actors should have the ability to react to their environment and other actors in order to deliver a great performance.