Author urges fans to stop disrupting filming.

The author of The Summer I Turned Pretty has issued a plea to fans to stop turning up to the set of the movie spin-off, asking them to 'protect our process'.

The film is set to be a follow-up to the hit Prime Video series, based on the trilogy of books by Jenny Han, which concluded with its third season last year.

The show follows Isabel 'Belly' Conklin (Lola Tung) and her complex love triangle with brothers Conrad (Christopher Briney) and Jeremiah (Gavin Casalegno) Fisher. 

Since the film was announced, eager fans have been trying to obtain details of the plot by turning up to the set in North Carolina.

In a bid to protect the storyline, Jenny posted a statement on her Instagram Stories, writing: 'When people come to set, film, and share videos, it disrupts the work. It makes it harder for actors to get into character and causes unnecessary anxiety for them.'

'We often have to stop production to clear crowds from the shot, which breaks the crew's focus.

'This story means a lot to me, and I know it means a lot to you, too. I want to give you the best version of this movie. Please help protect our process.'

Her statement echoes one released by Prime Video, who shared a post featuring 'Privacy Please' written in the sand on a beach.

They said in the caption: 'We love the excitement, but sharing locations and visiting set disrupts filming and creates real safety concerns for our cast and crew.

'We're working hard to create a protected bubble to make the best movie possible. Please help us protect the magic of Cousins until it's ready to be shared.'

The third season of the beloved show concluded last year with Belly and Conrad finally finding love after their romance was almost derailed by a love triangle with Jeremiah - with Belly pulling out of her planned wedding to Conrad's brother in the final hour.

It was announced in September that there would be a movie conclusion to the story, with Jenny explaining at the time that it was 'always her vision' to say goodbye to the trio in a film rather than the TV show.

She told People: 'I knew that's what I wanted to do, and I knew that it was going to take a beat to put everything into place.

'I feel like there are still some more things that the audience wants to see, and I wanted to deliver that to them in a bigger way than (just) wrapping up at the end of the season.'

However, following the film's announcement, it was claimed last month that members of the cast felt 'forced' to sign up while still working on the TV show, after being told by bosses their pay would be 'frozen.'

According to Deadline, cast members Tung, Briney and Casalegno, as well as Sean Kaufman and Rain Spencer, negotiated salary increases ahead of season three.

The publication states that while season one performed well enough to be renewed, The Summer I Turned Pretty 'flew under the radar' as Prime Video was less known for YA content at the time.

Meanwhile, the show's increased following by season two led to the cast renegotiating salaries with Wiip.

This is the lead studio which, in coordination with Amazon, makes talent deals.

And according to Deadline's sources, the actors were asked to commit to a movie while talks were in advanced or final stages.

Sources close to the talent reportedly said at least some of the stars were unwilling to do this - being told they would get salary rises if they signed up to the movie.

Although Wiip reportedly held firm, with the actors agreeing to do the film and this was included in renegotiated contracts that brought raises in season three.

Talent sources told Deadline that at least some of the actors felt 'forced', with their raises in jeopardy, to accept these terms - signing on 'under duress'.

While sources close to the studio told the publication that the actors were 'aligned' on the proposal and agreed to it.

According to Deadline's sources, the salary increases are thought to be in the region of $100,000 per episode.

They go on to state that, as series lead, Lola Tung, 23, is believed to have earned more than her male co-stars throughout the show.