Emma Stone and Margot Robbie are both talented actresses who have captivated audiences with their performances. While they do share certain physical similarities, such as fair skin, blonde hair (though Emma Stone is known to switch hair colors for roles), and captivating blue eyes, they also have distinct facial features and appearances.
Whether or not someone could pass them off as sisters would depend on the context and individual perception of the people involved. In the entertainment industry, it is not uncommon for people to find resemblances between celebrities who are not related at all. However, it's essential to remember that they are two separate individuals, each with their own unique traits and talents.
Ultimately, the notion of whether they can be "passed off as sisters" is subjective and varies from person to person. It's essential to appreciate and celebrate each actress for their individuality and the contributions they make to their respective craft.