Jo-Anne and Aaron Easterbrook were in the midst of having their wedding photos taken at Palm Cove in Queensland, Australia, when the photographer heard a commotion and realized a fisherman's boat had capsized.
The groomsmen, Dougal "Doogs" Grey and Clayton "Deani" Deane jumped into action. They stripped down to their underwear and dove into the water to rescue him.
The whole time, the wedding photographer was shooting the rescue. The bride and groom watched in disbelief, and appreciation.
"It took a bit of camera pressure off me and Aaron so, yeah, it was a bit of a break," Jo-Anne Easterbrook said. "There was a lot of jokes about it at the reception, about the boys in their underwear obviously."
The fisherman, according to Aaron Easterbrook, was just "a bit shocked" and "exhausted," but was uninjured.
After rescuing the fisherman, the groomsmen continued with the photo shoot, this time in their underwear.
ABC News contributed to this report.