He also played the private eye Gene Parmesean in Arrested Development.
In 2016, Mull got a single Emmy nomination for his Veep character Bob Bradley.
In his career, Mull did many roles. In 1985, he co-wrote the mockumentary The History of White People in America with Fred Willard.
He loved comedy and songwriting. Country music star Jane Morgan made a parody of A Boy Named Sue in his song A Girl Named Johnny Cash in the early 1970s.
The song was number one on Billboard’s Hot Country Songs list for five weeks.
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