In a large bowl, beat the cream cheese until smooth and creamy.

Add the powdered sugar and vanilla extract, beating until well combined.

Gently fold in the whipped heavy cream until the mixture is uniform and fluffy.

Add the quartered strawberries, blueberries, and mini marshmallows to the bowl.

Carefully fold the fruit and marshmallows into the cheesecake mixture until evenly coated.

Cover and chill in the refrigerator for at least 1 hour before serving.