Decker is married to tennis player Andy Roddick.Decker was born in Kettering, Ohio, the daughter of Tessa (née Moore), a nurse, and Stephen Decker, a pacemaker salesman. Decker began her modeling career as the face of Mauri Simone, a popular prom dress maker. Decker was chosen cover girl for the 2010 edition, shot on location in the Maldives islands. Decker appeared in the 2007 made-for-television Lipshitz Saves the World. In 2008, Decker rang the New York Stock Exchange bell with other Sports Illustrated models.
Decker is represented by Marilyn Agency.
Decker made a guest appearance on NBC's Chuck, where she played a model applying to be a "Buy More Girl." Decker played swimsuit model Rachel, while Peter Jacobson played Alan, her nebbish husband.
On February 8, 2010, David Letterman announced on Late Show with David Letterman that Decker had been chosen as the 2010 Sports Illustrated Swimsuit covermodel.Decker won Esquire magazine's 2010 "Sexiest Woman Alive" bracket challenge.
