Dundee marked their return to the top flight with a 1-1 draw against Kilmarnock in front of 7,588 fans at Dens Park.
Gary Harkins gave Paul Hartley's men a 17th-minute lead from the penalty spot but Craig Slater equalised seven minutes later.
Last season's Premiership runners-up Motherwell kicked off their campaign by beating St Mirren 1-0 at Fir Park.
Lee Erwin scored his first goal for the club as Saints, who had Jim Goodwin sent off for a second yellow card, paid the price for missing some good chances.
Inverness Caley Thistle defeated newly-promoted Hamilton Accies 2-0 at New Douglas Park thanks to first-half goals from Billy McKay and Ryan Christie.