Preheat oven to 375 F. Place one pie crust into a round 9-inch pie plate. In a large bowl, combine drained cherries, sugar, cornstarch, lemon juice, and vanilla extract.
Pour mixture into pie crust. Place butter over the filling. Place the remaining pie crust over the filling. Seal edges, make four slits at the top of the pie. Bake for 45-50 minutes.