WEBThomas John Mitchell (Irish: Tomás Mistéal; July 11, 1892 – December 17, 1962) was an Irish-American actor and writer. Among his most famous roles in a long career are those of Gerald O'Hara in Gone with the Wind, Doc Boone in Stagecoach, Uncle Billy in It's a Wonderful Life, Pat Garrett in The Outlaw, and Mayor Jonas Henderson in High Noon.