Some cinemas have banned young people wearing suits from screenings of Minions: The Rise of Gru over rowdy behaviour fuelled by a TikTok trend.
Teenagers following the #gentleminions trend have been accused of making noise and throwing things during screenings.
A staff member at one venue told the BBC they wanted to ensure the experience was not spoiled for younger children on their first cinema trip.
Some cinemas said they have had to give huge numbers of refunds.
Videos showing young people dressing up in suits to watch the movie in large groups and cheering loudly during the screening have gone viral on TikTok, racking up millions of views in some cases.
The teenagers filmed themselves copying the characteristic steepled fingers of the movie's supervillain Felonious Gru and celebrated that "the five year wait is over" - referring to the time since the franchise's last instalment, Despicable Me 3.
Movie studio Universal Pictures endorsed the trend, saying on Twitter: "to everyone showing up to @Minions in suits: we see you and we love you".
Why Minions is crushing the box office. pic.twitter.com/IsFSW7Tkrf— Rob Keyes (@rob_keyes) July 3, 2022
But cinemas have been less appreciative, with several complaining about the behaviour of the young fans drawn to the movie by TikTok.
Guernsey's only cinema had to cancel further screenings of the movie, blaming "stunningly bad behaviour", including vandalism, throwing objects and abusing staff.
Mallard Cinema manager Daniel Phillips-Smith said: "It's been absolutely heartbreaking. We've had families who won't even go back into the screen when we've tried to sort it out, families leaving before the film has even started, and of course the children have been in tears."
The cinema had suffered a "massive" financial impact from all the refunds for customers' whose viewing of the film had been disturbed, he said.
The Regal Cinema in Wadebridge, Cornwall, posted a notice saying it would no longer admit "unaccompanied children wearing suits" to screenings of the movie.
Box office staff told the BBC young people in suits had been "cheering, clapping, whooping" and rising to their feet throughout the film.
"We were trying to talk to people on the way in after a while, but that wasn't really getting anywhere.
"So we had to just decide to put a stop to it and say thanks very much, but we're not doing the whole TikTok trend thing," a staff member said.
"We had people coming in with children for their first cinema trip ever and we wanted to protect that, really."
Images on social media showed several Odeon cinemas displaying signs warning customers: "Due to recent disturbances following the #GentleMinions trend, any group of guests in formal attire will be refused entry for showings of Minions: The Rise of Gru."
The Gentleminions TikTok trend is insane pic.twitter.com/68xpeeorB6— Ed Barnes (@edbarnesjourno) July 3, 2022
But some cinemagoers praised the behaviour of the #gentleminions at their screenings.
Stace Woods, a teaching assistant from Surrey, said on social media that a group in suits when she saw the film were "so much fun" and "so well-behaved", adding they politely stopped bowing down and worshipping a giant poster of Gru so her children could pose for a photo with it.
One parent told the Mansfield Chad the ban on young people in suits had extended to two boys in his 13-year-old son's group, who were merely wearing white shirts with collars.
They were reportedly turned away from their pre-booked screening until parents could drive down with a couple of jumpers to cover the offending items of smart clothing.
A spokesperson for the Odeon said: "Due to a small number of incidents in our cinemas over the weekend we have had to restrict access in some circumstances."
The Vue cinema chain said it was still welcoming all customers to see the film, which had been "incredibly popular" over the opening weekend.
The Minions movie franchise, which began with 2010's Despicable Me, follows reformed supervillain Gru and his army of small, yellow henchmen, who quickly became the subject of endless online memes.
The latest film tells Gru's origin story as an 11-year-old, struggling to break into the supervillain business.
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