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ST. LOUIS (KSDK) - One bold Cardinals fan surprised his girlfriend with a marriage proposal outside Busch Stadium ahead of Monday's home opener against the Cincinnati Reds.

Zachary Herman said his family has a long tradition of attending Opening Day at Busch, and long plotted to use the occasion to propose to Caitlin Schmidt.

Herman, the son of NewsChannel 5 photojournalist Tom Herman, said he'd planned to propose to Schmidt since last August. Herman spoke with her parents, who live in Atlanta, and received their blessing during a Thanksgiving visit last November.

As members of both families posed for a picture in front of Stan Musial's statute, that's when Zachary reached in his pocket and pulled out a ring box.

Watch the video player above to see Caitlin's reaction.