The club’s new owners the Venky’s Group decided to axe the pair following Rovers’ 2-1 defeat to Bolton on Sunday.
A club statement read: “The Venky’s Group, owners of Blackburn Rovers Football Club, has today confirmed the departure of manager Sam Allardyce and assistant manager Neil McDonald with immediate effect.
“First team coaching duties will be taken on by Steve Kean (currently first team coach) for the immediate future.
“We have taken this decision as part of our wider plans and ambitions for the club.
“We would like to put on record our thanks to Mr Allardyce for his contribution to Blackburn Rovers Football Club.”
