To prepare the filling, add the condensed milk, evaporated milk and lime juice into a blender. Blend until smooth.
Pour the milk and lime juice mixture into the cooled graham cracker crust in the spring form pan.
Place in the freezer until frozen, 6 to 8 hours or overnight.
Garnish with whipping cream, lime slices, mint leaves and/or fresh berries, if desired
Serve right away. If you want to store it, make sure you place it back in the freezer.