How old was Judy Garland when she made The Wizard of Oz (1939)?

Judy Garland (born Frances Ethel Gumm; June 10, 1922 – June 22, 1969) was an American singer, actress, and vaudevillian. She was renowned for her contralto vocals and attained international stardom that continued throughout a career spanning more than 40 years as an actress in musical and dramatic roles, as a recording artist, and on concert stages.

Turning sixteen on the 10th June, 1938 Garland was only sixteen when she played her most famous role as Dorothy Gale in 'The Wizard of Oz' (1939). In the film, she sang the song with which she would be identified, "Over the Rainbow". Although producers Arthur Freed and Mervyn LeRoy had wanted her from the start, studio chief Mayer first tried to borrow Shirley Temple from 20th Century Fox, but they declined. Deanna Durbin was then asked, but was unavailable, resulting in Garland being cast.

Garland was initially outfitted in a blonde wig for the part, but Freed and LeRoy decided against it shortly into filming. Her blue gingham dress was chosen for its blurring effect on her figure, which made her look younger. Shooting commenced on October 13, 1938, and was completed on March 16, 1939, with a final cost of more than US$2 million.