In a bowl, combine crushed graham crackers and melted butter. Press firmly into the bottom and sides of a 9-inch pie dish.
Combine the softened cream cheese with condensed milk, lime juice, sugar and lime zest in a bowl until creamy and well incorporated.
Pour the cheesecake pie filling over the crust. Spread evenly and refrigerate at least 4 hours, or overnight.
Garnish as desired with limes, lime zest, or whipped cream.
(Nutrition information provided is an estimate and will vary based on cooking methods and brands of ingredients used.)