Tess McGill is a fictional character from the 1988 film Working Girl, portrayed by actress Melanie Griffith. She is a determined and ambitious secretary who dreams of climbing the corporate ladder in the male-dominated world of business. Tess is known for her resourcefulness and creativity, often using her intelligence to navigate challenges. In the film, Tess seizes an opportunity when her boss, Katharine Parker, played by Sigourney Weaver, is sidelined due to an injury. Tess takes on Katharine's identity to pitch a business idea, showcasing her talent and ambition. The story highlights themes of empowerment and the struggle for recognition in the workplace.