Tiffany Dawn Thornton (born February 14, 1986 in College Station, Texas, U.S.) is an American actress and singer-songwriter best known for her co-starring role as Tawni Hart on the Disney Channel Original Series, Sonny with a Chance and So Random! She voices Teena Sometimes in Kick Buttowski: Suburban Daredevil.
Thornton made her television acting debut in the pilot episode of the Fox sitcom, Quintuplets. She then went on to appear in 8 Simple Rules, American Dreams, The O.C., Desperate Housewives, That's So Raven, Jericho, Wizards of Waverly Place and Hannah Montana. In 2009, she began her role as Tawni Hart on the Disney Channel Original Series, Sonny with a Chance and then went on to play a part in the Disney Channel Original Movie, Hatching Pete. Sonny With a Chance ended on January 2, 2011 and was replaced by So Random!, which premiered on June 5, 2011, with Thornton in a starring role.
Thornton became engaged to her boyfriend of one year, Christopher Carney, a court officer, in December 2009. The two plan to marry on November 12, 2011. Thornton confirmed that her former co-star, Demi Lovato, will serve as one of her bridesmaids.