Kim Kardashian shared a loving birthday tribute to her nephew Mason Disick, with Kardashian fans left speechless at the youngster's transformation.
Mason, the eldest son of Kourtney Kardashian and her ex-boyfriend Scott Disick, turned 13 on Wednesday and his famous family flocked to social media to wish him a happy birthday.
Taking to her Instagram Stories, 42-year-old Kim shared a snap of her and Mason standing back-to-back, with the teen now visibly taller than his auntie.