VIDEO: Zac, Charlie & Amanda Talk 'Charlie St. Cloud'

Zac Efron, Amanda Crew and Charlie Tahan reminisce about their time spent filming Charlie St. Cloud and how they bonded on set!

OK! GALLERY: VANESSA STANDS BY HER MAN ZAC AT CHARLIE ST. CLOUD PREMIERE

Zac Efron stars as Charlie, whose younger brother, Sam (Charlie Tahan), gets killed in a car crash just before Charlie is to leave for college on a sailing scholarship. When Charlie leaves Sam's funeral, he finds Sam's ghost and promises never to leave him.

However, Charlie meets Tess (Amanda Crew), a former classmate and sailing champ, and has to decide whether to stay with Sam or start living his life again.

OK! NEWS: ZAC EFRON ON HIS CAREER — "THE STAKES ARE HIGH"

Moviefone spoke with the three stars about how they bonded on set and became just as close in real life as they appear in the film.

To get to know each other off set, Zac and Charlie say they went to movies and hockey games and practiced sailing together.

OK! GALLERY: ZAC EFRON TREATS FANS TO SOME PHOTO FUN

Lucky Amanda had the pleasure of kissing Zac in the film; to prepare, she says they built a friendship based on trust so filming the scene wouldn't be weird!

Charlie St. Cloud hits theaters this Friday!