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In 1925, William became the youngest director on the Universal lot at the time due to his promotion.
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In 1959, William's salary for the direction of Ben-Hur was $1,000,000.
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In 1959, William won the Kinema Junpo Award in the category of Best Foreign Language Film for his direction of the 1958 film The Big Country.
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William is portrayed by Joe Grifasi in the 1983 television-movie Will There Really Be a Morning?
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William stood at 5' 8" or 1.73 m.
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In 1976, William was honored with a Life Achievement Award at the American Film Institute, USA.