Liam Neeson
Alfred Kinsey

Laura Linney
Clara McMillen

Chris O'Donnell
Wardell Pomeroy

Peter Sarsgaard
Clyde Martin

Timothy Hutton
Paul Gebhard

John Lithgow
Alfred Seguine Kinsey

Tim Curry
Thurman Rice

Oliver Platt
Herman Wells

Dylan Baker
Alan Gregg

Julianne Nicholson
Alice Martin

William Sadler
Kenneth Braun

John McMartin
Huntington Hartford

Veronica Cartwright
Sara Kinsey

Kathleen Chalfant
Barbara Merkle

Heather Goldenhersh
Martha Pomeroy

Dagmara Dominczyk
Agnes Gebhard

John Krasinski
Ben

Arden Myrin
Emily

David Harbour
Robert Kinsey

Luke Macfarlane
Bruce Kinsey

Jenna Gavigan
Joan Kinsey

Judith Polson
Mildred Kinsey

Leigh Spofford
Anne Kinsey

Benjamin Walker
Kinsey (Age 19)

Matthew Fahey
Kinsey (Age 14)

Will Denton
Kinsey (Age 10)

Harley Cross
Young Man in Gay Bar

Katharine Houghton
Mrs. Spaulding

Lynn Redgrave
Final Interview Subject

Jarlath Conroy
Grocer

Jason Patrick Sands
Male Student #1

Marcel Simoneau
Male Student #2

Bobby Steggert
Male Student #3

Johnny Pruitt
Male Student #4