- “This disgusting person was absolutely unpredictable, had many facets and used his power to do terrible things. As a demagogue, he was second to none as he could interact with people. So I learned my lines and went with fun at Tarantino's set and played my scenes.”
- ―Sylvester Groth on his role
He is best known for playing the Nazi Minister of Propaganda Joseph Goebbels twice, first in the 2007 German film Mein Führer – Die wirklich wahrste Wahrheit über Adolf Hitler, and then in Quentin Tarantino's 2009 film Inglourious Basterds.
Prior, his first major film role was in 1993's Stalingrad.