Charlie St Cloud star Amanda Crew has revealed her love scenes with Zac Efron were cosier than they looked - as the grass they cavorted on was heated.
Amanda, who plays a world-class sailor in the drama based on the novel by Ben Sherwood, also told Hollywood.com the grass was fake.
"That grass was actually fake turf with a heater underneath," she laughed. "Because it was so cold and we knew we were going to be lying on this grass for quite a number of hours, they brought in fake grass and put in heaters underneath it. I think it was those heating blankets or something so that we could stay comfortable."
And she said the toasty turf made the scene much easier to film.
She said: "It was great. There were no bugs. It wasn't all wet and damp and cold - it was warm and toasty."