Answer
The answer is Metro Goldwyn Mayer (MGM). Stanley Donen collaborated with producer Arthur Freed at MGM, a prominent Hollywood film studio known for its successful musicals during the 1940s and 1950s. Donen and Freed worked together on several notable musicals, including "Singin' in the Rain" (1952) and "On the Town" (1949), which showcased Donen's innovative choreography and Freed's musical expertise, contributing to MGM's reputation for high-quality musical productions.