Keira Knightley's bold performance in David Cronenberg's 'A Dangerous Method' is splitting critics at the Venice Film Festival, who are finding her role as an uninhibited mental patient "fabulous" or laughable. Either way, those who've seen the film agree that her approach is extreme.

The film, which stars Viggo Mortensen and Michael Fassbender as, respectively, Sigmund Freud and Carl Jung, premiered Friday in Venice, and Knightley quickly became the most debated aspect.

Variety calls her performance "problematic," saying that her "brave but unskilled depiction of hysteria at times leaves itself open to easy laughs."