The former Manchester United winger put in an impressive performance during his side's 2-1 semi-final win over Watford on Sunday.
The ex-United player produced a sparkling performance during Palace's 2-1 semi-final win over Watford at Wembley on Sunday, helping his current employers set up a final with the Red Devils.
Zaha enjoyed a difficult spell at Old Trafford following his move from South London in 2013, which eventually saw him sold back to the Eagles just over a year later after falling out of favour with then boss David Moyes.
But despite those struggles, Pardew claims Sir Alex, the man responsible for bringing Zaha to Manchester, is still interested in keeping tabs on his former player.
And speaking after his side's win at Wembley, Pardew could not hide his delight at the 23-year-old's contribution to his team's victory, adding that the forward will be keen to get one over on his former club.
He told the club's official Twitter account: "Zaha had a slight injury before, which we were worried about, then he went and nearly scored one of the great semi-final goals.
"The final is going to be a big day for Wilf. This guy has got unbelievable potential.
"I spoke to Sir Alex in the week. He was asking about him because I think he's genuinely disappointed it didn't work out for Wilf."
But the former Newcastle boss, who was a player for Palace in their last cup final appearance, was quick to stress that his whole team deserved credit for Sunday's win.
He added: "I thought that the team was very focused today. It's only the seventh or eighth time I've managed to put that team on the pitch.
"The team delivered the game plan to the letter. My team were magnificent today. There were some outstanding performances."