Ian McKellen and Patrick Stewart share a long-standing friendship that began in the theater and has flourished through their collaborations in film and on stage. Both actors are renowned for their roles in the "X-Men" series, where they portrayed Magneto and Professor X, respectively. Their camaraderie extends beyond the screen, as they often appear together in interviews, charity events, and public performances, showcasing a deep mutual respect and affection. This close bond has made Stewart the most recognized best friend and co-star of McKellen in the entertainment industry.