Update: Click here for wedding photos and more sexy Kim shots. 8-26-11 

Kim Kardashian is engaged to Kris Humphries after six months of dating and quite a bit of PDA. Exciting as the news is, the real shocker is that the reality star kept her megawatt engagement ring hidden for a week.

                                             Click pictures to enlarge! 

The New Jersey Nets star asked the reality TV gal to marry him by surprising her at her Beverly Hills home on May 18, People reports. He covered her bedroom with rose petals spelling out "Will you marry Me?" sealing the deal with a custom-made 20.5 carat Lorraine Schwartz ring. (A stunner that rivals the size of her famed backside.)

"I didn't expect this at all," Kardashian told the mag. "I was in such shock. I never thought it would happen at home, and I never thought now."

"OMGGGGGGG!!!!!!!! It's true! I couldn't be happier!" Kardashian wrote on her blog, also confirming the annoucement on Twitter. "Thank you guys for all of the sweet messages!!!

Kim Kardashian's engagement ring is worth almost HALF as much as her Beverly Hills mansion ... sources close to the diamond tell TMZ the rock is valued at $2 MILLION!!!!!