Did you realize that between 1940 and 1963 Judy Garland made 28 movies? All of them were after she had done The Wizard of Oz. Very quickly, she did what a lot of young performers had been unable to do: she made the transition from kid to adult performer, co-starring with Gene Kelly in 1942's For Me and My Girl, and enjoying a massive hit two years later in Meet Me in St. Louis. Then, in 1945, she played a straight dramatic role (without any singing) in The Clock which co-starred Robert Walker.
Behind the scenes, things were not going so well for her. By 1947, at which time she's already been married twice, Judy suffered a nervous breakdown, yet somehow she pulled it all together and ended up co-starring with Fred Astaire the following year in Easter Parade, which became her biggest hit for MGM. Success, however, caused the studio to push harder, which impacted Judy in such a way that her addiction for sleeping pills, morphine, and alcohol was increasing, and resulted in her being briefly suspended by the studio and being replaced by Ginger Rogers on The Barkleys of Broadway.