In the flick, the late Glee star plays a store manager named James whose wife is suffering from PTSD. The film also stars Monteith's pal Kevin Zegers as a firefighter, Emily Hampshire as a store clerk and Karine Vanasse as James' wife.
In the two-minute trailer, James struggles with troubles in his marriage while balancing life at work. Monteith probably didn't have to do much research—as he once worked as a greeter at Walmart.
"He really bonded with everybody and he was always grinning and smiling and he made for a very fun set," the film's producer Tony Whalen told E! News after Monteith's death back in July of this year. "He was an inspiration to a lot of our actors and a couple in particular that once they worked with him, they were inspired to keep going with acting because of what Cory talked to them about. Everybody that he met, he inspired."
"Cory totally delivered," Whalen said. "There is this one particular scene that was a bit of a heated discussion with his wife and it was just unbelievable how powerful it was. He really embraced that role and he completely knocked everybody's socks off with his portrayal."
All the Wrong Reasons premieres at the Toronto Film Festival on Sept. 8. Monteith's final film role is in McCanick, which finds him playing a drug addict. The movie is currently in postproduction and does not yet have a release date.