def get_average_gross_value_per_movie(actors: dict) -> float:
    """
    Utility function to calculate the average gross value of actors in a given dictionary, per movie
    :param actors: Dictionary (Actor Name --> Actor Node)
    :return: Average Gross Value of the actors
    """
    total_gross_value = sum([actor_node.gross_value/(len(actor_node.movies_starred_in)+1)
                             for actor_node in actors.values()])
    return total_gross_value/len(actors)