WWE wrestler-turned-actor Dwayne "The Rock" Johnson made the announcement on his Instargam account.
"She introduced the world to 'CJ Parker' and became one of the most iconic characters of a generation - for the most successful TV show of all time.
"A pleasure to welcome (as gorgeous as ever) Pamela Anderson to our #Baywatch cast. We couldn't have made this movie without you. Welcome home. Thrilled you had a blast with us!," Johnson wrote on his Instagram, along with a photo that appeared to be clicked on the set.
The movie also stars Zac Efron, Priyanka Chopra, supermodel Charlotte McKinney, Alexandra Daddario, Hannibal Buress and Ilfenesh Hadera as Johnson's love interest.
The "Baywatch" movie will hit the theatres on May 19, 2017.
