Lewis Frederick Ayres III was an American actor whose film and television career spanned 65 years. He is best known for starring as German soldier Paul Bäumer in the film All Quiet on the Western Front (1930) and for playing Dr. Kildare in nine films. He was nominated for an Academy Award for Best Actor for his performance in Johnny Belinda (1948).

All Quiet on the Western Front is a 1930 American pre-Code epic anti-war film based on the 1929 novel of the same name by German novelist Erich Maria Remarque. Directed by Lewis Milestone, it stars Lew Ayres, Louis Wolheim, John Wray, Arnold Lucy, and Ben Alexander.