The heartbreaking romance flick P.S. I Love You almost became a real-life horror movie after Gerard Butler revealed he "almost killed" co-star Hilary Swank during filming.
Butler, 53, appeared on Drew Barrymore's talk show this week to talk about his career, where he discussed how he'd badly injured 48-year-old Swank while filming the movie adaptation of Cecelia Ahern's hit 2004 novel, P.S. I Love You.
The Scottish actor starred opposite Swank in the movie, which followed the story of a young widow who receives letters from her late husband that help to ease her pain from his tragic death.
It turns out that one scene in particular caused a little bit of drama when Swank was injured on the set of the 2007 flick.
"I remember saying to the director, 'I'm not going to think about myself in this movie,'" he recalled. "'I'm only going to think about her. Make sure she's OK. She's cool.' Because that's kind of who this (character) was. I'm going to tell you that made the experience so much more fun."
He then added that Swank was: "So cool and so great to work with that I almost killed her."
Butler was in fact referring to a scene in the movie where his character, Gerry Kennedy, was supposed to get smacked in the face with his suspender clip as he undresses.
However, when it came to shooting the scene, Butler said the piece flicked up and hit Swank's head instead, leaving her needing a hospital visit for her injuries.
"It gets stuck, it releases [and] flies over my head, hits her in the head - slashes her head," he explained to Barrymore. "I cut her open. You could even see the teeth [of the clip]. She had to get taken to the hospital.
"Imagine this studio, and in three seconds, everybody's gone. And I'm just sitting there in my Irish [shamrock] boxer shorts and my boots and a pair of socks, and I just started crying.
"I scarred Hilary Swank. I almost took her eye out, and I just made a fool of myself for two days," he added.
Embarrassing as it may have been, it could have been worse - thankfully he didn't take her eye out with the errant suspender clip instead.
P.S. I Love You received generally positive reviews from audience members, with Rotten Tomatoes audiences scoring the film an impressive 80%. Though, critics didn't like the movie as much, giving it a measly 20%.