Sheridan, who plays Edie Britt on the hit ABC (search) show, and Swedish actor Niklas Soderblom have called off their engagement, People magazine reported Wednesday.
The couple "have parted ways after a year and a half," Sheridan's publicist, Nicole Perna, said in a statement. "They ask that you respect their privacy at this time."
Sheridan and Soderblom became engaged last winter. It would have been the second marriage for Sheridan, who was wed to Harry Hamlin from 1991-93.
Sheridan, 41, was nominated for a Golden Globe last year for her role on "Desperate Housewives."