Banana Cream Cheesecake with Nuts

1 Yellow cake mix, prepared in 13x9 pan.
8 oz Cream cheese, room temperature
1 pk (3-oz) instant vanilla pudding
2 cup milk
3 Or 4 bananas
1 lg container cool whip
1 cup chopped nuts

Beat cream cheese until creamy. Add milk, gradually, add pudding, beating until well mixed. Pour over cooled cake. Slice the bananas over cake. Cover with Cool Whip and top with nuts.