In a mixing bowl, combine graham cracker crumbs, sugar, and melted butter. Press the mixture into the bottom of a springform pan.

In another bowl, beat the cream cheese until smooth. Gradually add the heavy cream, lime juice, lime zest, and powdered sugar, mixing until well combined.

Pour the filling over the crust in the springform pan. Smooth the top and refrigerate for at least 4 hours until set.