Kourtney mirrored her sister's gushing sentiments, tweeting, "@KendallJenner seriously strolled like a major supermodel down that catwalk tonight at the Sherri Hill fashion show. All I can say is WOW!"
This isn't the first time Kendall has worked it for the camera in the name of fashion. The lean and leggy teen is the face of swimwear designer Leah Madden's Summer 2012 campaign, which was shot in August, and previously, she has posed for Forever 21 with 14-year-old Kylie.
But even with her E! star status, the California native still gets starstruck at her own fame.
"Just drove through time square and started freaking out cuz I saw myself on a huge billboard! LOL (sorry, blurry)," Kendall tweeted later that night with a twitpic of a Keeping Up with the Kardashians marquee.