People's patience is wearing thin when it comes to being interrupted by others' mobile phones ringing, according to research by online entertainment site Whatsonstage.com.
The survey questioned 200 theatre-goers to determine what disturbances irritated them the most when they were watching a play.
Nine out of 10 theatre buffs said the shrill of mobile phones regularly disturbs them and it is getting worse.
"Several of our users have dubbed this [noise] phenomenon 'stage rage' and it seems to be on the rise," said Terri Paddock, editorial director of Whatsonstage.com.
With 70 percent of adults in the UK now owning mobiles, their trilling often seems unremitting.
"We do get many complaints from our customers that they have been disturbed because of other people's inconsiderate behaviour," said a spokesperson for Warner Village cinemas.
But there is little that companies can do except to ask people to turn off their mobile phones.
"We have banned mobiles from our cinemas and place warnings on the screens at the beginning of movies, but some people still insist on leaving their phones on and ruining the film for others," said the spokesperson.