"Based on a true shocking story that continues to capture national media attention, the film explores the inconceivable life of a con artist who, for years, called himself Clark Rockefeller and claimed to be a member of the powerful Rockefeller family," the network said in a news release Tuesday.
The TV movie is to premiere March 13 on Lifetime Television.
McCormack is best known for his work on the TV comedy "Will & Grace." Stringfield was a longtime "ER" cast member and Taylor's small-screen credits include "The Unit."
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