Aikman, in a statement published Tuesday by The Dallas Morning News, confirms the separation from his wife, Rhonda, in what he calls "a difficult decision" for both.
The couple married in 2000. Rhonda Aikman had a daughter from a previous marriage. The Aikmans have two daughters together.
Aikman on Feb. 6 is scheduled to be part of the Fox broadcast team for the Super Bowl at Cowboys Stadium, with the Packers facing the Steelers.
Messages left Tuesday for the Hall of Famer were not immediately returned to The Associated Press.