Place cut strawberries and 1/3 cup sugar. Stir together and place in the refrigerator until ready to assemble cake.

Mix cake mix as directed and pour into three 8" prepared cake pans. Bake just until set and slightly golden (approximately 15-20 minutes).

When cake has cooled, place cream cheese, sugar, and vanilla in the bowl of a standing mixer fitted with whisk attachment. Whisk at medium-high speed until light and fluffy. Scrape down the sides of the bowl as needed. Reduce speed to low and add heavy cream in slow stream. When almost fully combined, increase speed to medium-high and beat until mixture holds stiff peaks.

Place one cake layer in a large bowl or on a pedestal. Line the outer edges with a decorative row of strawberry halves. Fill the middle strawberry mixture. Top with a layer of the whipped cream mixture. Repeat one more layer. For the third and final layer place last cake on the other two layers. Arrange strawberry halves decoratively around the edge. Top with the remaining strawberry mixture. Serve with any left over whipped cream you may have. Have your guests just dig in!