Preheat the oven to 350°F (175°C).

Cut the croissants into bite-sized pieces and place them in a greased baking dish.

In a mixing bowl, blend the cream cheese, sugar, milk, eggs, and vanilla extract until smooth.

Add the sliced strawberries, blueberries, and raspberries to the cream cheese mixture and stir gently to combine.

Pour the berry and cream cheese mixture over the croissant pieces, ensuring they are evenly coated.

Bake in the preheated oven for 35 minutes or until the top is golden and set.