Priestley and Lowde wed Saturday on Paradise Island in the Bahamas, Weinstein said. No further details were available.
After several years together, the 35-year-old actor and Lowde, a makeup artist, became engaged last May. It is the second marriage for Priestley, who was married to Ashlee Peterson, also a makeup artist, for less than a year before divorcing in early 2000.
Priestley, who played Brandon Walsh on the long-running teen drama, was seriously injured in an August 2002 car crash. The avid race car driver spun out of control at 180 mph and hit a wall nearly head-on during practice at the Kentucky Speedway.
More recently, Priestley appeared in the campy independent film "Die Mommie Die!" He also directed the 1999 documentary "Barenaked in America," about his fellow Canadians, the band Barenaked Ladies.