Sigourney Weaver Was Determined To Tackle Difficult Underwater Scenes In The Avatar sequel to prove she’s still an action woman at 71.Kate Winslet needed diving classes tooThe actress reunited with director James Cameron for the Avatar sequels and admits she was initially overwhelmed by the amount of underwater scenes in the script, but she worked hard to prove she wouldn’t need a diving double.“I had some concerns, but that’s what the training was for,” she tells the New York Times‘ T magazine.