Louis Diamond Phillips (né Upchurch; born February 17, 1962) is a Filipino American actor and director. His breakthrough came when he starred as Ritchie Valens in the biographical drama film La Bamba (1987). For the Academy Award-nominated Stand and Deliver (1988), Phillips was nominated for a Golden Globe Award and won an Independent Spirit Award. He made his Broadway debut with the 1996 revival of The King and I, earning a Tony Award nomination for his portrayal of King Mongkut of Siam. Phillips' other notable films include Young Guns (1988), Young Guns II (1990), Courage Under Fire (1996), The Big Hit (1998), Brokedown Palace (1999), Che (2008), and The 33 (2015). In the television series Longmire, he played a main character named Henry Standing Bear.

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