Happy Father's Day to Caitlyn Jenner.

On the first Father's Day since the 65-year-old Olympian, formerly known as Bruce, first introduced Caitlyn to the world, daughter's Kylie, Kendall, and Khloe shared heartfelt messages on social media.

"Happy Father's Day my little light of sunshine," Kylie, 17, captioned a throwback photo of her as a little girl along with Kendall, Bruce and mom Kris.

She then seemed to quote her father's comforting words as he began making his transition to life as a woman.

"You can still call me dad, Kylie. No matter what I'm always going to be your father. That's never going to change," she added on Instagram.

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