Celtic and Rangers to meet twice in space of six days
The sides are due to meet at Hampden on Sunday 23 April in the William Hill Scottish Cup semi-final.
The sides have met four times already this season, with Rangers still seeking their first victory.
Celtic came out on top in the previous three meetings, winning 5-1 at home in the first league clash of the season, with Moussa Dembele scoring a hat-trick.
They then defeated Rangers 1-0 in the Betfred Cup semi-final at Hampden, with Dembele again the match-winner.
Celtic won the second league meeting of the season 2-1 at Ibrox, thanks to goals from Dembele and Sinclair after Rangers had led through Kenny Miller’s opener.