Quick and Easy Lemonade Pie

1 (0.18 ounce) package lemonade mix
1 (14 ounce) can sweetened condensed milk
8 ounces nondairy whipped topping
1 (9-inch) graham cracker pie crust

In a large bowl combine lemonade mix, whipped topping and sweetened condensed milk. Mix until smooth. Pour into pie shell. Chill until firm or overnight.