Late drama from Martial
United booked their place in the FA Cup final for the first time since the 2006/07 season with Anthony Martial's late winner cancelling out Chris Smalling's own goal after Marouane Fellaini had opened the scoring in the first period.
It was De Gea who proved to be the hero of the afternoon as he produced a great, strong save from Romelu Lukaku's penalty and Rooney said that the Spaniard was the main reason for reaching the final.
The skipper told MUTV that it was a "great penalty save" and that the "pace" of the spot kick displayed the "strong arm" on the keeper.
He continued saying that his former club had the "momentum" behind them at that point and proclaimed that De Gea was the "main reason" why they will return to Wembley.
Praise from all corners
De Gea received heaps of praise and midfielder Michael Carrick reiterated the praise of his captain saying that the 25-year-old had been excellent over the past few seasons.
He said that Lukaku's spot-kick was not a "bad penalty" but said the shot-stopper was "sensational" on the day and questioned how many times that has been said "over the last few years".
Carrick continued saying that De Gea kept them "in the game again and that it is "what we’ve come to expect from him" and was hopeful that the Red Devils can have "quieter games" between "now and the end of the season".
Timothy Fosu-Trafford also showed his appreciation for De Gea with the defender tweeting after the game, "Thank you, David".
Manchester United will host league leaders Leicester City at Old Trafford on Sunday, May 1 with kick-off at 14:05.