Caitlyn Jenner posted on Instagram a video of her wearing a plunging, one-piece bathing suit as she walked on a beach.

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"Forty years ago my therapist asked me what my fantasy is. I told her walking on the beach being my authentic self and..." she captioned the clip, which shows her approaching the camera, taking off her floppy hat, twirling and saying, "Free!"

Jenner, 67, is a reality TV personality and retired Olympic decathlete, who came out as transgender in 2015.

Jenner is the father of six adult children, including models Kylie Jenner and Kendall Jenner, as well as the former step-father of the "Keeping of with the Kardashians" clan.