Martin O'Neill and Shaun Maloney have been named as Celtic's interim mangement team following Brendan Rodgers' departure.
O'Neill enjoyed a trophy-laden spell at Celtic Park between 2000 and 2005 and led the club to the UEFA Cup final in 2003.
After his time in Glasgow, the 73-year-old had spells with Aston Villa, Sunderland, Nottingham Forest and the Republic of Ireland national team.
Former player Maloney returned to the club this summer as Professional Player Pathway Manager.
After his playing career, the 42-year-old managed Hibernian and Wigan Athletic.