Mix crushed graham crackers, melted butter, and sugar until combined and press into a pan.
Chill crust in refrigerator for 15 minutes.
Beat cream cheese until smooth and fluffy.
Add sugar, vanilla, orange juice, and orange zest and mix well.
Prepare orange gelatin as per instructions and mix into filling.
Whip heavy cream until soft peaks form and gently fold into mixture.
Pour filling over crust and smooth the top evenly.
Refrigerate for at least 6 hours or overnight until fully set.
Decorate with whipped cream and orange slices before serving.