We aren't the only ones adjusting to Caitlyn Jenner's transition -- Kendall and Kylie Jenner tackled their first Father's Day after Caitlyn's transition with aplomb. Before sharing sweet snaps on social media, the sisters arrived back in Los Angeles on Saturday Night to spend time with their dad on Father's Day.

Along with a sweet snap from her childhood, the 19-year-old model wrote, "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."

The "It" girl spent the day poolside with her sister Kylie and a gal pal, Lauren Perez. The brunette threesome donned matching one pieces as they lounged poolside yesterday.

Meanwhile, Kendall wasn't the only one wishing Caitlyn a happy Father's Day. Her sister Khloe Kardashian also shared a picture of the Olympian with her late father, Robert Kardashian.

Kylie also shared an old image of the two sisters and her parents with the caption, "Happy Father's Day my little light of sunshine. "You can still call me dad, Kylie. No matter what I'm always going to be your father. That's never going to change."'