Pienaar told evertonTV: "It will definitely be on top. I've played in a lot of important games and I think this one will also go down in the history books and I'm looking forward to it."
Having played in some of German football's grandest fixtures, Pienaar insists he will not be daunted by Wembley's 90,000 capacity crowd.
Indeed, in his Dortmund days it was normal for him to perform in front of numbers not dissimilar to that which will await him on Sunday.
"When I was at Borussia Dortmund we used to play every weekend in front of 83,000, so it's quite close," he said. "At Ajax when we played AC Milan in the Champions League I played at the San Siro which was also a big stadium.
"For me, this is like a normal game, it's just that it's a semi-final. Like when you play at home with all the supporters behind you, you have to enjoy the moment."