Manchester United gate-crashed West Ham United's FA Cup farewell party at Upton Park with a 2-1 victory to book a semi-final berth against Everton.
A sensational goal from teenager Marcus Rashford and Marouane Fellaini's close-range effort, both in the second half, settled the quarter-final replay after the sides drew the first game 1-1 at Old Trafford.
The scene was set for a momentous 155th and final FA Cup tie at the Boleyn Stadium which West Ham will soon swap for the Olympic Stadium but after a promising start it was the visitors who rose to the occasion.
Rashford deservedly put United in front after 54 minutes with a pinpoint curler from the edge of the area and Fellaini bundled in Anthony Martial's cross 13 minutes later.
James Tomkins's header set up a tumultuous climax in which Andy Carroll headed narrowly over and David de Gea made a sensational save from Emmanuel Emenike as United hung on to keep alive their hopes of ending a disappointing season with a trophy.
Crystal Palace and Watford meet in the other semi-final.
Manchester United's Michael Carrick told the BBC "It was massive. A great opportunity for us to get to Wembley. West Ham are flying and it's a tough place to come. We believed we would come here and win and we have done that."
Carrick spoke about goalkeeper David De Gea: "He's been unbelievable for us for so long now. We needed him at the end. The goal gave them incentive. We defended well at times but David stepped up.
"We have had some terrific results and some bad ones. That's something we have tried to put right. We need to be consistent and that's the challenge we have to set ourselves."