9. Kate Mara
Before gaining fame for her roles in House of Cards and Fantastic Four, Kate Mara appeared in a minor role in Iron Man 2. She played a U.S. Marshal tasked with delivering a subpoena to Tony Stark. Her brief but impactful scene adds to the film’s complex web of political and personal challenges facing Stark.
Although her role was small, Mara’s performance contributed to the film’s dynamic ensemble, showcasing her ability to leave a lasting impression even with limited screen time.