Keira Knightley: 'Dangerous Method' Premiere with Viggo Mortensen!

Keira Knightley and her co-star Viggo Mortensen attend the premiere of their film A Dangerous Method at Roy Thomson Hall during the 2011 Toronto International Film Festival on Saturday (September 10) in Toronto, Canada.

Earlier in the day, the 26-year-old British actress and the 52-year-old actor posed for portraits and attended a press conference for their film.

PHOTOS: Check out the latest pics of Keira Knightley

A Dangerous Method is based on the turbulent relationships between fledgling psychiatrist Carl Jung (Michael Fassbender), his mentor Sigmund Freud (Mortensen), and Sabina Spielrein (Knightley), the troubled but beautiful young woman who comes between them.

FYI: Keira is wearing a nude lace long-sleeve backless cocktail dress by Elie Saab.

10+ pictures inside of Keira Knightley and Viggo Mortensen at the premiere…