Prepare the Strawberries: Cut off the stems and slice each strawberry in half lengthwise. Cut a small sliver off the back of each half for stability and hollow out the center.
Whip the Cream: Beat the heavy whipping cream until stiff peaks form, about five minutes.
Mix Cream Cheese Filling: Combine softened cream cheese, sour cream, sugar, vanilla extract, and lemon juice. Beat until smooth and creamy.
Combine Mixtures: Gently fold the whipped cream into the cream cheese mixture, being careful not to overmix.
Pipe into Strawberries: Transfer the filling into a piping bag and pipe into each hollowed-out strawberry half.
Garnish and Serve: Sprinkle graham cracker crumbs over each filled strawberry and arrange on a serving platter.