The couple, who will share their exclusive wedding photos in HELLO! magazine next week, were joined by more than 200 guests including Olympians, former Strictly Come Dancing stars, TV presenters and explorers.
The sun shone brightly as Helen and Steve, who met in 2014, exchanged their vows in an outdoors ceremony. "None of us could have hoped for a day like today," said Steve. "It's like the weather has come out to wish us well."
See the exclusive photos of Helen Glover and Steve Backshall's wedding in HELLO! next week
Helen grew up in nearby Penzance, which held a homecoming parade for the Olympian six days before her wedding day.
The wedding came just under a month after Helen defended her coxless pair title with partner Heather Stanning at Rio 2016. "I was so focused on the Olympics, one of the first things Heather said to me afterwards is 'you're getting married now'," Helen has said.
Read full details of the wedding – including Helen's dress, speeches and surprises – in HELLO! magazine next week.