Kate Winslet stars in "Avatar: The Way of Water," a sequel to 2009's "Avatar."
Winslet plays a member of the Metkayina clan named Ronal.
The movie is set underwater and filmed in a tank built specifically for the movie.
Winslet and other actors are trained to hold their breath underwater.
Winslet holds her breath for a record-breaking 7.5 minutes, beating Tom Cruise's record.
Cast also includes Sigourney Weaver, Vin Diesel, and Zoe Saldaña.
Actors trained in underwater dance and gymnastics and learned Na’vi sign language.
Despite mixed reviews, the film's special effects and star power make it memorable.