Darren Mackie added a second after 76 minutes before Rangers' Nacho Novo was dismissed for a lunge on Stuart Duff.

BBC: Aberdeen 2-0 Rangers

Ledley's winner followed a free-kick by Ki Sung-Yueng, but Butcher felt Stuart Duff had been harshly penalised for a challenge on Emilio Izaguirre.

BBC: Joe Ledley heads Celtic's winner

The hosts made a lively start, with Aluko darting down the right before crossing for Stuart Duff, but the midfielder's shot was easily blocked by former Don Lee Mair.

BBC: Steve MacLean and Zander Diamond celebrate

Langfield proceeded to palm away a Darcheville drive on the counter-attack, while Stuart Duff drove a shot inches wide for the Dons with both sides displaying a tangible sense of urgency.

BBC: Aberdeen 2-0 Rangers

Bryson made a goal-line clearance to deny Rooney and the home striker's shot was saved by the legs of Bell following a Stuart Duff cross, but the visitors were taking control of the game with their slick passing.

BBC: Sport - Football - Inverness CT 1-3 Kilmarnock