Robbie Neilson has been appointed the manager of MK Dons.
Compensation was agreed with Hearts and Neilson and Steve Crawford will manage the team from Monday.
"I'm delighted," Neilson told MK Dons website. "It's great to be here and I'm looking forward to developing the club, developing the players and moving the club forward.
"The most important thing for me was picking the right chairman and the right club and this was the right match at the right time - it's a club that's going places.
"Hopefully the fans are ready for the ride. We want to create excitement but, most importantly, win football matches. With the squad that we've got here, we should be winning football matches - our job is to help them do that."