Full cast of Harriet the Spy

Beanie Feldstein

Harriet M. Welsch (voice)

20 episodes

Jane Lynch

Ole Golly (voice)

20 episodes

Lacey Chabert

Marion Hawthorne (voice)

20 episodes

Kimberly Brooks

Janie (voice)

20 episodes

Crispin Freeman

Mr. Welsch / Mr. Withers (voice)

20 episodes

Grey DeLisle

Mrs. Welsch (voice)

20 episodes

Bumper Robinson

Mr. Horatio / Doorman (voice)

20 episodes

Charlie Schlatter

Sport (voice)

20 episodes