But you’re right—Frank Gehry really did guest star on an episode of Arthur, and he wasn’t the only one. John LewisIn the 2018 episode “Arthur Takes a Stand,” Lakewood Elementary School welcomed guest speaker John Lewis, who empowered Arthur to organize a sit-in so the school would agree to let lunch lady Mrs. MacGrady hire a much-needed assistant. Matt DamonMatt Damon played a caricature of himself in a season 11 episode called “The Making of Arthur,” in which Damon invited kids to film their own videos and submit them for a contest. Arthur didn't win, but Damon was impressed enough that he decided to produce a show based on Arthur’s life. Lynch played Mr. Ratburn’s sister Patty, whom Arthur and friends accidentally assumed was his fiancée.