Brokeback Mountain costars Anne Hathaway and Jake Gyllenhaal are set to reunite onscreen in a movie about a sex drug salesman.The actors, who played an unhappy husband and wife in the Oscar-winning 2005 movie, are being lined up to play lovers once more in the big screen adaptation of author Jamie Reidy's non-fiction book Hard Sell: Confessions of a Viagra Salesman. According to the Hollywood Reporter, Love and Other Drugs will see Gyllenhaal portray the lead character, a sales representative for drug giant Pfizer who embarks on a romance with Parkinson's sufferer Hathaway.