William Ostler (died December 16, 1614) was an actor in English Renaissance theatre, a member of the King's Men, the company of William Shakespeare. Ostler started out as a boy player in the Children of the Chapel troupe; he was cast in their 1601 production of Ben Jonson's "The Poetaster", with Nathan Field and John Underwood, two other future King's Men. Ostler, like Underwood, joined the King's Men most likely in 1608 or soon after. Wikipedia
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