The film, a remake of a 2007 British movie of the same name, revolves around a dysfunctional family which comes together for the patriarch's funeral, only to be rocked by gay revelations from the deceased's alleged former lover.
The pair pretended to be best friends for the film, which began shooting last spring (09), but Wilson admits he's still baffled that Morgan failed to recognise him when he stepped off the set - and continued to call him by the wrong name.
Wilson explains, "We were together all day long... We'd been working together for two weeks at one point and it was the end of the day on Friday and I said, 'Tracy, I'll see you later. Have a good weekend.'
"He looked over and I was in street clothes. I could tell he didn't recognise me - after two weeks. And I said, 'It's Luke.' He said, 'Have a good weekend, Lou.' He called me 'Lou.'"