Answer:
The Party at Kitty and Stud’s (1970) was Sylvester Stallone’s first movie.
Sylvester Stallone was paid US $200 for two days' work. Stallone had to work in the film out of desperation after being evicted from his apartment. He was homeless for several days and slept three weeks in the New York City Port Authority bus station.
A casting notice for the film got him the role.
The film was released several years later as Italian Stallion, in order to cash in on Stallone's new found fame.
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