Neil Warnock has been appointed as manager of Aberdeen until the end of the season.
The 75-year-old takes over from Barry Robson, who was dismissed last Wednesday with the club currently eighth in the Scottish Premiership table.
It marks a return to football management for Warnock, who left Championship side Huddersfield in September.
Warnock said: "I'm really looking forward to the challenge here at Aberdeen.
"I've made no secret of the fact I've always wanted to manage in Scotland so when I spoke to (chairman) Dave (Cormack) and (chief executive) Alan (Burrows) and they asked me to help out it just felt like the right opportunity.
"By all accounts there is a good group of lads here and it's my job now to get the best out of them.
"Aberdeen is a big club with clear ambition and I'm hoping that during my time here the supporters will get behind the team and I can put a smile on their faces."
Warnock has been in charge of 15 different clubs over more than four decades of management and came out of retirement 12 months ago for his second stint at Huddersfield, steering them away from the relegation zone.
Aberdeen chairman Cormack told the club website: "From the moment we first spoke with Neil his enthusiasm for managing Aberdeen was infectious.
"He has had an incredible career in management, not only in terms of volume of games and winning promotions, but also of coming into clubs at short notice and making an immediate impact."
Speaking on Sky Sports ahead of Aberdeen's draw with Celtic on Saturday, pundit Kris Boyd was critical of the Dons' plans to appoint an interim manager.
"I don't quite know why they've got to that stage," said Boyd.
"Aberdeen, from where they are at this moment in time in the league, is an absolute disgrace. Where are Aberdeen going as a football club?"