Kendall, 19, has just been named the new face of beauty brand Estee Lauder - which ranks as another major landmark in her burgeoning career as a model - and half-sister Khloe, 30, has been quick to hail her younger sibling's latest achievement.
She posted on Instagram: ''I am literally jumping up-and-down with pride and joy for my baby sister!!!!! @kendalljenner is the new face of @esteelauder!!! (sic)''
Khloe added: ''It takes so much courage to actually go ahead and conquer your dreams. Most people just talk about what they want to do. You are actually living what you've dreamed you'd always do! Proud of you baby girl.''
Last month, meanwhile, Kourtney Kardashian described Kendall as her ''favourite family member.''
Kourtney, 35, said she was extremely proud of her half-sister for carving out a successful career as a model.
In a joint interview with her sister Khloe, the 'Keeping Up with the Kardashians' star told E! News: ''She is my favourite family member, besides Khloé. I love her.''
Asked about Kendall's success, Khloe said: ''I don't know... it's bizarre.''