Oh deer! We bet the bride and groom didn't expect to see these guys in their wedding photo:

This incredible pic -- which racked up over one million views in just under five hours -- was posted to Reddit Monday with the caption, "My brother shot a wedding this weekend, they had some unexpected guests."

So how did photographer Ian Christmann manage to get such an amazing shot?

According to his website, the deer appeared at the edge of the forest during the reception and he knew he had to act fast. "I grabbed the bride and groom while they were eating their meal to see if we could get a photo or two near the group," he wrote. "What I didn’t expect was that we were able to get so close!"

For even more photos, head over to Catalyst Photography.