Ordinary Boys singer Samuel Preston, 24, and Chantelle Hougton married in London on Friday, according to reports.
The London venue was surrounded by security guards
Details of the ceremony, believed to have taken place at Dartmouth House in central London, were kept secret as part of a lucrative magazine deal.
The pair met in January as contestants on Channel 4's Celebrity Big Brother, and became engaged three months later.
Houghton, 23, was planted in the house as a fake celebrity but went on to win the show.
Preston's bandmates were photographed outside the hotel
Since being named the winner of the TV reality show, former model Chantelle has starred in her own series Chantelle: Living the Dream, on E4.
Elizabeth Emanuel, who designed Houghton's wedding dress, was photographed outside London's Chesterfield Hotel where the reception was reportedly being held.
Preston's bandmates, Simon Golding and James Gregory, were also pictured outside the hotel on Friday. The Sussex quartet had a top 10 hit in February with Boys Will Be Boys.
A spokewoman for the couple confirmed they had been expected to get married yesterday.