Dwight R.B. Cook is an actor and singer who, in 1978, performed the voice of the Fat Blue lead singer of the Sesame Street song "Disco D," while someone else did the puppeteering.

In addition to acting and singing, Cook writes musicals and short plays, and acts as stage manager both in the theater and on television. He is also the production manager of the Carl J. Murphy Fine Arts Center at Morgan State University in Baltimore, Maryland.

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