Actor Daniel Radcliffe (L) and actress Zoe Kazan attend the world premiere of the film "The F Word" during the 38th Toronto International Film Festival at Ryerson Theatre in Toronto, Canada, Sept. 7, 2013.(Xinhua/Zou Zheng)

Actress Evelyne Brochu attends the world premiere of the film "The F Word" duringthe 38th Toronto International Film Festival at Ryerson Theatre inToronto, Canada, Sept. 7, 2013. (Xinhua/Zou Zheng)

Director Michael Dowse attends the world premiere of the film "The F Word" duringthe 38th Toronto International Film Festival at Ryerson Theatre inToronto, Canada, Sept. 7, 2013. (Xinhua/Zou Zheng)

Actor Adam Driver attends the world premiere of the film "The F Word" during the 38thToronto International Film Festival at Ryerson Theatre in Toronto,Canada, Sept. 7, 2013. (Xinhua/Zou Zheng)

Actor Daniel Radcliffe attends the world premiere of the film "The F Word"during the 38th Toronto International Film Festival at RyersonTheatre in Toronto, Canada, Sept. 7, 2013. (Xinhua/Zou Zheng)

Actress Cara Gee attends the world premiere of the film "The F Word" during the 38thToronto International Film Festival at Ryerson Theatre in Toronto,Canada, Sept. 7, 2013. (Xinhua/Zou Zheng)

Actor Adam Driver,actress Megan Park, actor Daniel Radcliffe, actress Zoe Kazan anddirector Michael Dowse(L-R) attend the world premiere of the film"The F Word" during the 38th Toronto International Film Festival atRyerson Theatre in Toronto, Canada, Sept. 7, 2013. (Xinhua/ZouZheng)