Sunday was the first Father's Day since Caitlyn Jenner publicly revealed that she had transitioned, and three of her daughters paid touching tributes to her on social media. (Jenner has said that she doesn't mind if her children still refer to her as "Dad" post-transition.)
Khloe Kardashian posted a photo of Caitlyn, her step-parent, with Khloe's father, the late Robert Kardashian, and noted that she was "lucky enough" to have two fathers.
Added Kendall, after posting her own photo: "My whole life this soul was my daddy and just because your appearance is different now doesn't mean you were any less of a father to me my entire life. Happy Father's Day to the person who raised me, and taught me everything I know, my hero."
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I Am Cait, the docuseries about Caitlyn's transition, is scheduled to premiere on E! on July 26.