It was a day when Crawley did themselves proud, with Steve Evans' side losing 1-0 to a Wes Brown goal in front of 74,778.
They were roared on by thousands of fans in the away end who enjoyed a day to remember.
To mark that occasion we have dug into our archives to bring you some of the great pictures of fans enjoying their day.
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1. Manchester United 1 Crawley 0 - 19th Feb 2011
Crawley Town fans enjoy breakfast at the Pelham Buckle pub before boarding coaches to Manchester to watch their team take on Manchester United. Photo: Oli Scarff
2. Manchester United 1 Crawley 0 - 19th Feb 2011
Crawley Town fans enjoy breakfast at the Pelham Buckle pub ahead of the trip to before boarding the coaches to Manchester. Photo: Oli Scarff
3. Manchester United 1 Crawley 0 - 19th Feb 2011
A member of staff at the Pelham Buckle pub watches as a coach carries fans of Crawley Town to Manchester. Photo: Oli Scarff
4. Manchester United 1 Crawley 0 - 19th Feb 2011
We're on our way . Photo: Oli Scarff