The Baywatch movie has found one of its lady lifeguards! Dwayne Johnson took to Instagram on Wednesday to announce that his San Andreas costar Alexandra Daddario has joined the cast.

IT'S OFFICIAL: Want to welcome the talented and gorgeous @alexannadaddario to the cast of #BAYWATCH for the role of "Summer". Alex is a one of kind woman (I know from experience) and can't wait for you guys to see her own the role. The female roles of #BAYWATCH have become extremely hot properties around Hollywood and as promised, the quality women we'll cast are stepping into these roles to have fun and make them iconic for the world to enjoy. The #BaywatchFamily so far consists of a tatted up bald guy named Rock, the cool, yet extremely unattractive @zacefron, the talented and gorgeous Alexandra Daddario...and some big casting announcements coming soon. And juuuuust wait til you guys see who we cast for the iconic role of "CJ Parker"....👀 #CueSlowMotionRunningDownTheBeach #WhosPuttingTanningOilOnMyBack? #OrMyFront #BAYWATCH 👊🏾🌊

A photo posted by therock (@therock) on

Daddario replied on Twitter, joking that she's "been practicing my slow-mo run all morning.

The True Detective actress will play Summer, who happens to be the love interest of Zac Efron's character. Summer was played by Nicole Eggert in the 90s TV series that inspired the movie.

Johnson also added that casting for CJ, the role famously played by Pamela Anderson, will be "coming soon." Do you have an idea of who should play her?