Julie Andrews

Mary Poppins

Dick Van Dyke

Bert / Mr. Dawes Sr.

David Tomlinson

Mr. Banks

Glynis Johns

Mrs. Banks

Hermione Baddeley

Ellen

Karen Dotrice

Jane Banks

Matthew Garber

Michael Banks

Elsa Lanchester

Katie Nanna

Arthur Treacher

Constable

Reginald Owen

Admiral Boom

Ed Wynn

Uncle Albert

Reta Shaw

Mrs. Brill

Arthur Malet

Mr. Dawes Jr.

Jane Darwell

Bird Woman

Don Barclay

Mr. Binnacle

Marjorie Eaton

Miss Persimmon

Marjorie Bennett

Miss Lark

Doris Lloyd

Depositor (uncredited)

Dal McKennon

Penguin Waiters / Carousel Guard / Horse / Fox (voice)

Daws Butler

Turtle/Penguin (voice) (uncredited)

Bill Lee

Ram (voice) (uncredited)

Alan Napier

Huntsman/Reporter #3/Hound (voice) (uncredited)

Thurl Ravenscroft

Hog / Andrew's Whimper (Voice) (Uncredited)

J. Pat O'Malley

Pearly Drummer/Master of Hounds/Huntsman/Hound/Horse/Penguin/Reporter #2/Photographer (Voice) (Uncredited)

Marni Nixon

Geese (Voice) (Uncredited)

Betty Lou Gerson

Old Crone (Uncredited)

Richard M. Sherman

Penguin / Pearly (Voice) (Uncredited)

Robert B. Sherman

Pearly Banjo Player (Voice) (Uncredited)