An emotional Aitor Karanka said that Boro's promotion is "more than deserved" after a 1-1 draw with Brighton and Hove Albion earned the club a place in next season's Premier League.
"When I arrived here, some people thought I was crazy to say I wanted to get this club in the Premier League again," Boro's Head Coach told Sky Sports.
"But now, three and a half years later, Middlesbrough Football Club is going to be in the position where it deserves to be."
The Head Coach also heaped praise on the club, its supporters, and Chairman Steve Gibson after guiding the club's return to England's top flight for the first time since 2008.
"You can't be more proud of this group of players, this crowd, this Chairman," he said.
"It is more than deserved. I just want to say thank you once again because it's amazing for me."
Boro's Head Coach also gave credit to opponents Brighton, who will now contest the Play Offs.
"We knew it was going to be difficult. We had won a lot of games but Brighton and Burnley had been really with us also.
"In the Championship it always goes to the last second. When you achieve something like that even in those difficult moments it is better."