Jack Grunsky 💼 Singer, singer-songwriter Jack Guest 💼 Rower Jack Haley 💼 Singer, screenwriter, film actor, stage actor Jack Hannah 💼 Screenwriter, animator, film director, actor, director Jack Harlow 💼 Rapper, singer, songwriter, record producer, actor Jack Haven 💼 Film actor, television actor Jack Hawkins 💼 Actor, film actor, stage actor, film producer, film director Jack Herer 💼 Writer, politician, activist Jack Higgins 💼 Novelist, writer, screenwriter, author, school teacher Jack Hirsh 💼 University teacher Jack Hodgins 💼 University teacher, writer Jack Hughes 💼 Ice hockey player Jack Huston 💼 Actor, film actor, stage actor, television actor, voice actor, video game actor, film director, film screenwriter, film producer Jack Irons 💼 Drummer, composer Jack Johnson 💼 Boxer Jack Kehoe 💼 Actor, television actor Jack Kelly Sr. (rower) 💼 Rower, entrepreneur Jack Kemp 💼 Politician, american football player, writer, canadian football player, businessperson Jack Kent Cooke 💼 Businessperson Jack Kerouac 💼 Writer, poet, novelist, screenwriter, prose writer Jack Kesy 💼 Film actor, television actor, actor, film producer Jack Ketchum 💼 Novelist, literary agent, screenwriter, writer Jack Kevorkian 💼 Physician, composer, painter, jazz musician, pathologist, politician, anatomical pathologist, polyglot Jack Kilby 💼 Inventor, university teacher, computer scientist, photographer, engineer, physicist, electronic engineer Jack Kilmer 💼 Actor, voice actor, film actor Jack Kirby 💼 Penciller, inker, comics writer, character designer, storyboard artist, animator, comics artist Jack Klugman 💼 Film actor, screenwriter, stage actor, television actor, director, military officer, actor, film director, military personnel, comedian, writer Jack Kornfield 💼 Writer, psychologist Jack Kramer 💼 Tennis player, sports journalist Jack Kruschen 💼 Film actor, television actor Jack LaLanne 💼 Nutritionist, businessperson, inventor, chiropractor, dietitian, actor, television actor, writer, athlete, bodybuilder, entrepreneur Jack Langedijk 💼 Actor Jack Laugher 💼 Competitive diver, swimmer Jack Laviolette 💼 Ice hockey player Jack Layton 💼 Politician, university teacher, political scientist, legislator Jack Lemmon 💼 Film actor, character actor, television actor, actor, television presenter, stage actor, musician, director, film producer, producer, comedian Jack Levine 💼 Painter, engraver, artist, designer Jack Lew 💼 Lawyer, university teacher, politician Jack Liddle 💼 Athletics competitor Jack London 💼 Writer, journalist, novelist, war correspondent, essayist, autobiographer, screenwriter, science fiction writer, children's writer, travel writer, prose writer, poet, diarist, seaman, traveler Jack Lord 💼 Film director, film producer, stage actor, film actor, television actor Jack Lovelock 💼 Journalist, middle-distance runner, athletics competitor Jack Lowden 💼 Actor, stage actor, television actor, executive producer Jack Lynch 💼 Politician, gaelic football player, hurler, barrister Jack Ma 💼 Entrepreneur, philanthropist Jack Markell 💼 Politician, ambassador Jack Markle 💼 Ice hockey player Jack Marshall 💼 Politician, diplomat, lawyer Jack McBain 💼 Ice hockey player Jack McBrayer 💼 Comedian, television actor, film actor, voice actor Jack McCulloch 💼 Speed skater, ice hockey player, figure skater, canoeist, roller skater Jack McDevitt 💼 Writer, novelist, science fiction writer Jack McDonald (ice hockey, born 1887) 💼 Ice hockey player Jack McInerney 💼 Association football player Jack Medica 💼 Swimmer Jack Mercer 💼 Animator, voice actor, screenwriter Jack Mulhall 💼 Film actor, actor Jack Murdoch 💼 Rower Jack Nance 💼 Actor, stage actor, television actor, film actor Jack Nicholson 💼 Film actor, actor, film director, screenwriter, film producer, character actor, television actor, writer, director, film screenwriter, producer