Robbie Neilson hopes he can turn Dons' fortunes around after being confirmed as manager on Friday.
The 36-year-old left Hearts on Thursday night to take over at Stadium MK in a saga that has unfolded over the last week.
“I’m delighted,” Neilson told MK Dons PlayerHD. “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.”
Chairman Pete Winkelman added: “I’m hugely excited. Robbie has been on our list from day one – he’s the most exciting young manager in the UK, by a country mile.
“Hearts are a good club. They didn’t stand in Robbie’s way and they made it possible. They worked with us to make sure it was as smooth as it could be, given that it’s in the middle of the season.
“He was at a big club and he was doing well at a big club so we had to get our timing right. We wanted to make sure that we would get the right person for the job and I’m so pleased to be sitting here – almost within the time frame that I gave everyone – with the man I believe is going to take this football club forward.”