Reese Witherspoon has shared an adorable throwback snap to her time in the Girl Scouts, with many fans suggesting her eldest son was the "spitting image" of her.The Oscar-winning actress took to Instagram to share the picture, joking: "I bet you can guess who sold the most cookies for Troop 1077.""So adorable," her pal Julianne Margulies commented, as Kristen Chenoweth added: "But of course!!! I expect no less!!! ( i may or may not have done the same.