Kendall Jenner and Kylie Jenner Share Beautiful Father's Day Tributes to Caitlyn Jenner, With Childhood Pics

"Happy Father's Day to the person who raised me, and taught me everything I know, my hero," Kendall wrote

On Father's Day 2015, Kendall Jenner and Kylie Jenner paid special tributes to Caitlyn Jenner.

The 19-year-old and 17-year-old sisters and Keeping Up With the Kardashians stars posted on Instagram on Sunday childhood photos themselves with the Olympian, who recently transitioned to become a woman.

"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," Kendall wrote. "Happy Father's Day to the person who raised me, and taught me everything I know, my hero."

"Happy Father's Day my little light of sunshine," Kylie wrote, quoting Caitlyn as saying, "You can still call me dad, Kylie. No matter what I'm always going to be your father. That's never going to change."

Khloé Kardashian also posted on her own page a pic of Caitlyn, before her transition, sitting with the reality star's late dad, Robert Kardashian.

"Thank you Lord for blessing me with not one phenomenal father but I was lucky enough to have two," she wrote. "Happy Father's Day!!!"

Caitlyn revealed in a TV interview in April that she is transitioning. Caitlyn revealed her female name and identity in a Vanity Fair cover story on June 1 and has undergone plastic surgery to appear more feminine.

(With the release of the Vanity Fair story, Caitlyn has chosen to identify publicly as a woman and E! News will refer to her using female pronouns. In stories published before this date, she was referred to as Bruce Jenner and male pronouns were used.)

A Keeping Up With the Kardashians special titled About Bruce focused on the Kardashian and Jenner family members' reactions to Caitlyn's gender identity struggle and physical change.

Meanwhile, Caitlyn was photographed wearing women's clothes in public for the first time more than a week ago, en route to the LGBT Center's Youth Center in Hollywood, where she met with transgender youth. She had said she wanted to help the LGBT community.

After Caitlyn's TV interview aired, her family members took to Twitter to voice their support.

 "I love you, so very proud of you, my hero," Kendall had said.

She also shared a photos of a fifth grade school assignment, in which she wrote, "If I could be anybody in the world, I would be my dad."