In a large bowl, combine sugar, flour, vanilla, cinnamon and allspice. Add the peaches and blueberries; toss until coated with flour mixture.
Roll out pie crust and place into the bottom of pie plate. Pour filling into prepared crust. Place little dabs of butter all over the fruit. Roll out remaining crust, cut into long strips, carefully weave together to create a lattice. Place lattice crust over the top of the pie. Brush crust with milk; sprinkle with cinnamon-sugar.
Bake at 400° for 50-60 minutes or until crust is golden brown. Cool completely before serving