“Shear Madness,” one of the most popular comedies in the world, is onstage at Ivoryton Playhouse. A hilarious whodunit, the production is known for its madcap improvisation and surprise endings.

This show tells a story that takes place in the Shear Madness hair-styling salon. “During the course of the action, a murder is committed and the audience gets to spot the clues, question the suspects, and solve the funniest mystery in the annals of crime,” says a news release. “The outcome is never the same, which is why many audience members return again and again to the scene of the mayhem.”

“Shear Madness” runs Friday, Sept. 20, through Sunday, Oct. 6. First produced in Boston in 1980, it’s been delighting audiences ever since. The show was voted Best Comedy of the Year seven times by the Boston Globe and was named Best Play of the Year by the Chicago Sun-Times and the Philadelphia Enquirer.

“Shear Madness” also received the Raven Award from the Mystery Writers of America, and was inducted into the Comedy Hall of Fame — the first play ever to receive that accolade, the release said.

In addition, it’s listed in the Guinness Book of World Records as the longest running play in the history of the United States. “Shear Madness” has been translated into 23 languages and has played everywhere from Spain to Australia.

Ivoryton Playhouse, 103 Main St. Friday, Sept. 20-Sunday, Oct. 6. Wednesday and Thursday 7:30 p.m., Friday and Saturday 8 p.m. Wednesday and Sunday matinees 2 p.m. $55 adults, $50 seniors, $25 students, $20 children. 860-767-7318