In the end as MK Dons ran riot against relegated Yeovil all they had to hope was that Preston failed to beat relegation threatened Colchester United.
In the end Preston blew their chance of a return to the Championship and must now face the daunting thought of the play-offs - North End have the worst record of any league side having been in nine play-offs before without success.
Colchester grabbed a vital 1-0 win which also saw the Essex side retain League 1 status on the last day fro the third season running.
After their success, MK Dons manager Karl Robinson told BBC Three Counties Radio:
"I just feel numb. What an amazing 12 months we've had. A year ago we were playing Leyton Orient here in a nothing game and we were bowled over.
"I'm just so proud of the players. Every single player gave their all from the first whistle to the last whistle of the season. It's an amazing day, we'll never ever forget it."
It is the first time MK Dons have reached this level of football.