NFL cheerleader gets engaged mid-game after her boyfriend sneaks on the field wearing 'Marry Me' jersey

An Indianapolis Colts cheerleader got the surprise of a lifetime during a routine in Sunday's game. 

Mika, a fourth-year cheerleader for the Colts, thought Sunday's showdown against the Arizona Cardinals was just another gameday - until her life changed midway through the Week 6 victory. 

The Ohio native was proposed to by her longtime boyfriend, Spencer, in an adorable on-field engagement. 

Mika was performing with the rest of the Colts' cheer squad near the endzone in the second half when Spencer, wearing a custom Indianapolis jersey bearing the message 'Marry me' on the back, snuck up on her from behind. 

Completely unaware of her boyfriend and his impending question, the cheerleader continued to perform the routine, only becoming aware of the surprise when her fellow dancers unexpectedly dropped to the ground. 

Mika whipped around in confusion to find Spencer down on one knee behind her. She immediately became overwhelmed with emotion, shedding a few happy tears in shock. 

She dropped her pom poms and fell to her knees in front of her boyfriend, repeatedly nodding her head in answer. 

The couple shared a sweet kiss before Spencer slipped the stunning ring on her finger as her fellow cheerleaders rushed to hug Mika and the tens of thousands of fans in attendance wildly celebrated the happy occasion. 

'The most amazing day made possible by the most amazing people,' Mika wrote on Instagram alongside a series of adorable snaps from the day. 

Mika, who is also a director of corporate communications, and Spencer will be celebrating their two-year anniversary in December. 

The proposal was just another highlight from the Colts' 31-27 victory over the Cardinals, which saw them improve to 5-1.