The big boys enter the scene in this round with Celtic, Rangers, Aberdeen and Motherwell in action.
Livingston face Ayr United on Saturday at 16:00. Games that day also include Hibernian v Dundee and Motherwell v St Johnstone. There is an all Championship clash between Alloa v Hearts and Arbroath v Dunfermline.
The Saturday evening kick-off sees 2013 winners face 2014 winners when St Mirren play Aberdeen in Paisley.
Rangers and Celtic are in action on Sunday. The Hoops are at home to Ross County while Rangers are away to Falkirk.