What was the real age of each cast member in the sound of music?

In "The Sound of Music," the ages of the main cast members during filming in 1964 varied significantly. Julie Andrews, who played Maria, was born in 1935, making her around 29 years old at the time. Christopher Plummer, who portrayed Captain von Trapp, was born in 1929, making him about 35. Other notable cast members included Eleanor Parker (the Baroness) born in 1922, and Angela Cartwright (Brigitta), who was just 11 years old during production.