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Casey Siemaszko
Then: Siemaszko had already played one of Biff’s buddies in “Back to the Future” before landing the role of Vern’s big brother Billy in “Stand By Me.”
Now: He never achieved widespread fame, but has landed consistent acting jobs over the years including recurring roles on “NYPD Blue” and the first season of “Damages” and an appearance in Michael Mann’s “Public Enemies.”
