Priyanka, 33, who made her Hollywood TV debut with thriller series "Quantico" last year, will be seen playing the villainous Victoria Leeds in the upcoming movie based on the 1990s TV series.
Johnson, 43, posted a video on Instagram, welcoming her on board.
"She's one of the biggest stars in the world. Insanely talented, relentlessly smokin' and extremely dangerous - perfect for #BAYWATCH. Welcome @PriyankaChopra to our bad ass and incredibly dysfunctional family.
"Cue RATED R slo-mo running on the beach. We start shooting next week. World. #WelcomeToBaywatch" he captioned the video.
"Baywatch" movie also stars Alexandra Daddario, Ilfenesh Hadera and Kelly Rohrbach.