Pompey, who have been out of the second division for the past 12 years, are now back in the big time.
Manager John Mousinho has led the team to this success in League One after taking over from Danny Cowley mid-season.
Advertisement
Advertisement
Club owner Michael Eisner tweeted: "Congratulations to all of Pompey! From the players to all of the staff to the fans - what an accomplishment to celebrate with the city of Portsmouth!
"Congrats to Andrew Cullen, Rich Hughes and John Mousinho for putting together a super group of footballers. That has made all the difference."