Complex sentence: She studied at the Pasadena Playhouse (1964-65), first garnering fame on "The Waltons" as "Jenny Pendleton" in 1973, for which role she was awarded a Golden Globe award as most promising new actress.
Split into simpler sentences: She studied at the Pasadena Playhouse (1964-65). For her role on "The Waltons", Allen received a Golden Globe award as most promising new actress.