Dean Jagger was 34 years old when he starred in the 1954 film "White Christmas." He was born on October 3, 1910, and passed away on November 14, 1991. He was an actor, known for roles in films such as "The Deep Blue Sea," "The World According to Garp," and "The Fall of the Roman Empire." He won an Academy Award for Best Supporting Actor for his role in "Twelve O'Clock High" in 1949.