Who is Kirby Jenner? He is the best kept secret according to the Kardashians. He is Kendall's fictional fraternal twin brother.
Back in 2015, he started adding himself to Kardashian-Jenner photos making his Instagram account a popular parody account. Kris and Kendall Jenner are producing the 8 episodes of the new Quibi series, The Kirby Jenner Show.The sisters will join in on the fun as well as celebrities like Ray Romano and Ted Danson.