He's done Shakespeare on stage and serious drama on screen, but "The Sound of Music" is still what most fans want to talk to Christopher Plummer about -- and that hurts him.

"It's not divine to know that one of your most mediocre performances is the most famous thing you've ever done," said Plummer, who played Captain Von Trapp in the 1965 classic.

While making the movie, Plummer said he kept reminding anyone who'd listen how "gooey and sentimental and yucky it was."

Plummer, 78, said that he's come to realize that as movie musicals go, it's one of the best, mainly because of Julie Andrews.

But that doesn't stop him from referring to "The Sound of Music" as "S and M," or from opening a chapter in his autobiography with a quote from Doug McClure who once said "watching 'The Sound of Music' is like being beaten to death by a Hallmark card."

Plummer's book is called "In Spite of Myself."

The actor's disdain for the movie certainly wasn't lost on Charmian Carr, who played his oldest daughter, Liesel. In a 2000 @ The Movies interview with Tim Lammers talk about her book, "Forever Liesel," Carr revealed how Plummer felt about the film.

"He hated doing 'Sound of Music,' but he has warmed up to in his later years," Carr said. "He accepts it as a good film now. But he used to call it 'The Sound of Mucus' for a long, long time."