Villa's home clash with Sunderland switched for TV coverage
The game will now take place on Monday April 29 at 8pm for Sky Sports coverage.
The match was originally due to be played on Saturday April 27, with a 3pm kick-off.
The exciting encounter pits Paul Lambert against his former Celtic boss - and former Villa manager - Martin O'Neill.
Villa won the corresponding fixture 1-0 between the two clubs in November 2012, Gabby Agbonlahor netting the winner.
Former players Craig Gardner, Carlos Cuellar and Phil Bardsley will all return to Villa Park.
Make sure you snap up tickets for Villa v Liverpool.