The couple married in front of only their four children and a single witness on the French Caribbean island of St Barts.
"They had a beautiful ceremony in St Barts on a sail boat in front of their children," a source told the Daily Mail. "It was a spontaneous decision and wanted it to just be them and their children."
"The family are an incredibly tight unit and they are very much in love," the source added.
The couple became engaged in August 2006 and have two children together, 4-year-old Heaven Rain and 3-year-old Shaya Braven.
Burke also has two other children from her first marriage to plastic surgeon Garth Fisher, 9-year-old Sierra Sky and 11-year-old Neriah.
She took over as co-host on Dancing with the Stars last year alongside Tom Bergeron.
The new season of Dancing with the Stars begins on September 19.