Supporters packed the famous stadium to bid farewell to their iconic manager of over 26 years, providing a cacophony of noise to greet their hero on to the pitch before kick-off
Tickets changed hands for many times the face value as United fans from all over the world aimed to be part of the iconic manager's emotional farewell.
Those who managed to secure their seat were in the ground early to wave flags and form mosaics, including the word "Champions" along the recently renamed Sir Alex Ferguson stand, and "20" - the number of league titles won by the club - on the Stretford End.
The atmosphere was electric as the 71-year-old Scot, who announced his retirement after more than 26 years at the helm on Wednesday, emerged from the tunnel and out on to the pitch through a guard of honour, with supporters singing at the top of their voices and waving red flags to create one of the most spectacular sights ever witnessed at an English football stadium.
Every inch of Old Trafford was covered by those red flags, enthusiastically waved by fans belting "Championes, Championes, ole ole ole!" and songs in tribute of the man who has won 13 Premier League titles and two Champions League crowns in his time in Manchester.
As he made his way to his seat on the bench, past a club official holding up the fourth official's board bearing the message "26:20", Sir Alex was mobbed by supporters looking for autographs, with fans young and old seen to be fighting back the tears.
Former players were in attendance to pay tribute to the most successful manager in British football history, with Steve Bruce and Bryan Robson interviewed by the Sky cameras before the game, while Dwight Yorke and Peter Schmeichel joined Gary Neville in the broadcaster's studio to discuss their former boss.
As the game against the Swans wore on, fans continued to sing songs about their manager and Paul Scholes, who was also making his final home appearance. The United crowd also dusted off classic odes to former heroes, such as Andy Cole, Cristiano Ronaldo and Eric Cantona.
It was truly a party atmosphere as players and supporters readied themselves for the post-match presentation of the Premier League trophy, as well as the emotional farewell of Sir Alex, who will address the Old Trafford crowd for the final time.