Efron's deal with fans for filming
Zac Efron had to negotiate with fans to ensure a quiet shoot whilst making Charlie St Cloud.
Speaking at the film's LA premiere, director Burr Steers revealed the crew had to send out a daily negotiator to broker deals with the young star's fans, who waged a daily campaign to catch a glimpse of their hero.
"Every day we would negotiate with them," he explained.
"We'd be terrified because they were teeming and ready to run through the gates and we would negotiate and say that Zac would be with them at the end of the shooting day," Burr told reporters.
He added: "No matter how long we shot, he would show up and be signing autographs for two hours, even after a long day of shooting."
The director, who also worked with Zac on 17 Again, said the actor's strong work ethic was part of the reason he had wanted to team up with him on another movie.
"He's an incredible hard worker and incredibly enthusiastic which is a phenomenal combination to have in your lead actor," he said.