If you love Melissa McCarthy for her comedy chops [1], wait until you see her full range. In Can You Ever Forgive Me?, McCarthy stars as Lee Israel, a real-life magazine writer whose life took a turn when she began forging and selling letters [2] that she said had been written by deceased writers. Isreal pleaded guilty to one count of conspiracy to transport stolen property in 1993 and wrote a memoir about her life which inspired the upcoming biopic. Watch the full trailer above and prepare to be captivated by McCarthy's performance when the film hits theatres on Oct. 19.