Mary McCormack
Explore the best Mary McCormack movies ranked by Movie Rankings users. Browse biography, ranked filmography, and movie detail links for Mary McCormack.
Mary Catherine McCormack is an American actress. She has had leading roles as Justine Appleton on the series Murder One (1995–1997), as Deputy National Security Adviser Kate Harper on The West Wing (2004–2006), as Deputy U.S. Marshal Mary Shannon on In Plain Sight (2008–2012), and as Peggy on the comedy series The Kids Are Alright (2018–2019).
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Sources & freshness
Last refreshed from site data on May 10, 2026.
