Preheat oven to 350°F (175°C). Grease and flour a 9x13 inch baking pan.

In a medium bowl, combine the softened cream cheese, sour cream, powdered sugar, and vanilla extract. Mix until smooth and creamy.

Spread the cream cheese mixture evenly over the bottom of the prepared baking pan.

Pour the strawberry pie filling over the cream cheese mixture.

In a separate bowl, combine the melted butter and the white cake mix. Mix until just combined.

Crumble the cake mixture evenly over the top of the strawberry pie filling.

Bake for 30-35 minutes, or until the cake is golden brown and the filling is bubbly.

Let cool completely before serving. Enjoy!