A trailer for "All The Wrong Reasons" starring the late Cory Monteith has been released.  The movie is set to premiere at this weekend's Toronto International Film Festival. 

In it, he plays a department store manager who is struggling in his marriage to a woman with PTSD, and seeks comfort in another. 

The trailer shows Monteith looking more grown-up, wearing glasses and a tie for the role. 

Most fans knew him as the high school jock Finn Hudson on the Fox's "Glee."  The late actor died of a mixture of heroin and alcohol in July, at age 31. 

The late actor will be playing a drug addict in another upcoming film called "McCanick," which also premieres at the Toronto festival.