On August 10, 2015, it was announced that Zac Efron had been cast in the film. Johnson also announced that the film will be R-Rated. The report stated, "The story centers on a by-the-book and very serious lifeguard (Johnson) who is forced to team up with a young rule-flouting hothead (Efron) in order to save their beach from environmental destruction at the hands of an oil tycoon." That same month, reports were saying that Kelly Brook was in contention to star in the film as C.J. Parker, with Kate Upton and Charlotte McKinney also on the shortlist, but Brook denied the rumor the following day on Instagram. Brook later confirmed that she had read the script but was still uncertain if she would appear.