While we had been waiting in anticipation for Caitlyn Jenner's debut at the ESPYs [1], where she was honored with the Arthur Ashe courage award, her daughters Kendall and Kylie were the first to flaunt jaw-dropping gowns on their dad's big night [2].

Both ladies made their arrival [3] in sexy body-hugging dresses that glistened in the sun — Kylie's long-sleeved, high-neck Shady Zeineldine number was covered in gold sequins, while Kendall's sheer Alexandre Vauthier design featured shiny accents. Read on to see their bold sister moment, which Kylie didn't forget to document on Instagram [4]!

Kendall Jenner wore a black long-sleeved dress with sheer details and shiny accents, straight off the Alexandre Vauthier Couture Spring 2015 runway. The supermodel completed her look with Stuart Weitzman Nudist sandals and a couple of diamond rings.

Kylie chose a gold turtleneck gown by Lebanese designer Shady Zeineldine. She completed her look with a matching chain-strap handbag.

Kylie gave us a glimpse of the back of the ladies' dresses, captioning her photo with the sister emoji!

Kylie also shared this BTS-style shot with the caption, "espys for some fam support."