If you think it's only recently that Kendall and Kylie Jenner have come out of their shell, let us jog your memory.
Yesterday, a fan posted a compilation video of the twosome as kids, causing a ruckus wherever they went: play fighting (watch out for Kendall's quasi dropkick), screaming bloody murder, driving underage, and ordering cocktails on the rocks: "Make 'em strong, Derek!" commands Kylie.
Big sis Khloé says it best: "Look at my little sisters—look at them—they're insane."
The young Jenner gals have come a long way, what with 19-year-old Kendall an international supermodel and 17-year-old Kylie purchasing her own $2.7 million mansion. But that wild streak will always be there...