Kanye West Proposes to Kim Kardashian on Her Birthday, And Does It in Style [PHOTOS]

Kanye West allegedly told girlfriend Kim Kardashian at his concert in Seattle on Saturday that he planned to marry her 'one day.'

It now looks like Kanye West couldn't wait any longer to make their relationship official. He presented her with a 15-carat diamond ring.

The 36-year-old rapper proposed to the reality star on her 33rd birthday on Monday by renting out the entire AT&T Park baseball stadium in San Francisco, popping the question in front of their family and friends. He used a stadium sign to ask her to marry him.

See pictures of the ring and more after the cut.

Kim Kardashian wearing her engagement ring

Kanye was in Los Angeles earlier in the day at the Hollywood Film Awards, and it was therefore unclear whether he planned to spend Kim's birthday with her. 

She was allegedly seen boarding a private jet that afternoon with her family in Los Angeles.

Kanye flew in from San Francisco Monday to present director Steve McQueen with a special honor award at the ceremony, and it appears he must have flown back to the Bay Area city straight afterwards to see the mother of his child.

Their upcoming nuptials with be Kim's third marriage, and Kanye's first.