Hull City spanked Sunderland 3-0 in the quarter final match on Sunday to set up a last four clash with Sheffield United to be played at the Wembley Stadium.
The former Rangers striker who recently returned from an Achilles injury missed a penalty but praised his teammates for putting up a strong performance against the Black Cats.
"The squad is really buzzing. That was a really good result for us on Sunday and we put in a really strong performance,” he told the club website.
“It was an open game for long periods and I thought we got better the longer it went on and controlled it.
"Obviously goals change games and the game was over once we got the second. The atmosphere in the ground was really good and the fans got right behind us. The team really appreciated that.
"It feels good to be back out there, especially with us winning games as well. Obviously I was disappointed to miss the penalty on Sunday, but apart from that I felt I did okay," concluded Aluko who missed a first half penalty in the game.
Hull's only previous semi-final appearance in the FA Cup came in 1930.