Robert Preston as Harold Hill

Shirley Jones as Marian Paroo

Buddy Hackett as Marcellus Washburn

Ron Howard as Winthrop Paroo

Hermione Gingold as Eulalie Mackechnie Shinn

Paul Ford as Mayor George Shinn

Pert Kelton as Mrs. Paroo

Timmy Everett as Tommy Djilas

Susan Luckey as Zaneeta Shinn

Peggy Mondo as Ethel

Harry Hickox as Charlie Cowell

Jesslyn Fax as Avis Grubb

Mary Wickes as Mrs. Squires

Monique Vermont as Amaryllis

Charles Lane as Constable

William Fawcett as Lester Lonnergan

Barbara Pepper as Mrs. Hawkes

Max Showalter as Salesman On Train (uncredited)

Hank Worden as Undertaker

Sarah Seegar as Townswoman

Milton Parsons as Farmer

Larri Thomas as High School Girl

Colin Kenny as Brighton Townsman (uncredited)

Ronnie Dapo as Norbert Smith

Al Bain as Townsman (uncredited)

Ralph Hart as Young Boy Dancer

Delos Jewkes as Harley MacCauley

Charles Alvin Bell as Police Officer

Natalie Masters as Farmer's Wife (uncredited)

Percy Helton as Train Conductor (uncredited)

Jack Gordon as Townsman (uncredited)

Russell Custer as Townsman (uncredited)