Sarah E. Polley OC (born January 8, 1979) is a Canadian actress and film director. Polley first attained notice in her role as Sara Stanley in the Canadian television series Road to Avonlea. She has also starred in such films as Exotica, The Sweet Hereafter, Guinevere, Go, The Weight of Water, My Life Without Me, The Adventures of Baron Munchausen, Dawn of the Dead, Splice, and Mr. Nobody.
Polley made her feature film directorial debut with Away from Her, for which she won a Genie Award for Best Achievement in Direction and was nominated for an Academy Award for Best Adapted Screenplay. Polley's second film, Take This Waltz, premiered at the Toronto International Film Festival in 2011. Her latest film, Stories We Tell, is her first feature-length documentary. It had its world premiere at the 2012 Venice Film Festival, and its North American premiere followed at the Toronto International Film Festival. The Toronto Film Critics Association awarded it the $100,000 prize for best Canadian film of the year