The pair exchanged vows at the Woburn Abbey stately home in Bedfordshire, England in front of their nine-month-old son Parker, and guests including Sandford's The Saturdays bandmates.
Sandford, 25, reportedly broke down in tears as she walked down the aisle with the retired sportsman.
A source tells the Sunday Mirror newspaper: "It was an amazing day. Frankie looked beautiful and Wayne very handsome when they tied the knot. Frankie was crying her eyes out. Marrying Wayne makes her life feels complete."
Guests were entertained by boyband JLS, who reunited for a special performance.