Crystal Palace set up a repeat of the 1990 FA Cup final against Manchester United after Yannick Bolasie and Connor Wickham secured a 2-1 victory over Watford at Wembley.
Bolasie headed in Yohan Cabaye's corner to put Palace in front after six minutes and they should have built on their advantage before halftime against a lacklustre Watford.
Troy Deeney sparked the semi-final into life with Watford's equaliser nine minutes after halftime but they were only level for seven minutes.
Wickham stretched to meet a cross from Pape Souare and his header flew beyond the reach of flat-footed Watford keeper Costel Pantilimon who was slow to react.
Watford mounted some late pressure and there were a few anxious moments for Palace in stoppage time but they deservedly held on to set up a season finale against United who they lost to in a replay in their only other FA Cup final.
United beat Everton 2-1 on Sunday.