"Last night was truly magical!!!" Kardashian told E! News on Tuesday of the Monday proposal at AT&T Park in San Francisco.
"I am the luckiest girl in the world! I get to marry my best friend!"
West reportedly rented out the stadium and popped the question to the Keeping Up with the Kardashians star on her 33rd birthday when "PLEEEASE MARRY MEEE!!!!" flashed on a large screen while a 50-piece orchestra simultaneously played some of the bride-to-be's favorite songs -- including Lana Del Rey's "Young and Beautiful," followed by Keri Hilson, Ne-Yo and West's "Knock You Down."
E! News reported West presented Kardashian with a 15-carat Lorraine Schwartz diamond ring and fireworks and Roman candles were set off after he proposed.
Once Kardashian accepted the rapper's offer, her family and friends reportedly rushed out onto the field from one of the baseball park's dugouts to congratulate the couple.
However, Kardashian and West's four-month-old daughter North "Nori" West was allegedly not present for the occasion due to the cold weather and neither was sister Khloe Kardashian's husband Lamar Odom, who told TMZ he was invited but had better things to do that night.