Lightly spray a 9x9 inch pan or 9 inch round pan with cooking spray and line with parchent paper and set aside.
Using a food processor, blitz the graham crackers into it resembles sand.
Add the melted butter and continue blitzing into evenly mixed.
Transfer graham cracker mixture into the prepared pan. Spread into an even layer and press into pan to form a crust. Chill in freezer for at least an hour.
Mix the cream cheese, sugar, lime juice, vanilla extract, and heavy cream until smooth.
Pour filling over prepared crust and spread into an even layer.
Chill for at least 2 hours, then cut an serve.