Meryl Streep

Florence Foster Jenkins

Hugh Grant

St. Clair Bayfield

Simon Helberg

Cosmé McMoon

Rebecca Ferguson

Kathleen Weatherley

Nina Arianda

Agnes Stark

Stanley Townsend

Phineas Stark

Allan Corduner

John Totten

Christian McKay

Earl Wilson

David Haig

Carlo Edwards

John Sessions

Dr. Hermann

Brid Brennan

Kitty

John Kavanagh

Arturo Toscanini

Pat Starr

Mrs. Vanderbilt

Maggie Steed

Mrs. James O'Flaherty

Thelma Barlow

Mrs. Oscar Garmunder