The 15-year-old model seemed calm when she chatted with E! News before her debut, saying her outfit was "comfortable" and assuring us she could handle her sky-high heels. "They're not hard to walk in at all!" she said.
Of course, sisters Kourtney and Kim Kardashian and sister-in-law Kaela Humphries were on hand to support her, and Kim dished to us that couldn't believe how far Kendall's come...
"We are so proud," Kim said. "I remember Kendall was so nervous months ago, almost a year ago, to walk in a show, and she said she would never walk in one, so I'm really excited that she's not so nervous and just went for it."
Also on hand to see Kendall's debut and the Sherri Hill show were Donald Trump, Hoda Kotb and Kathie Lee Gifford, whose own daughter walked in the show, too.