Kim Kardashian and New Jersey Nets forward Kris Humphries are engaged. The reality star and basketball star began dating in December and the couple got serious quickly. And he proposed to her with a 20.5 carat diamond ring. The ring — designed by Lorraine Schwartz — features a 16.5 carat emerald cut center stone flanked by two 2-carat trapezoids. Total cost: $2 MIL.