Henrietta Lacks
Mary Kubick
Dr. George Gey
Mrs. Margaret Gey (as Karen Reynolds)
Board Administrator
Baby Deborah
Rebecca Skloot
Dr. Roland Pattillo
Deborah Lacks
Davon
Sonny Lacks
Lawrence Lacks
Day Lacks
Barbara Lacks
Teenage Deborah (as Kyanna Simone Simpson)
Dr. Susan Hsu
Dr. Victor McKusick
Alfred
Zakariyya
Sadie
Cootie
Cliff
Gladys
Young Gladys (as Jasmine Ellis)
Young Sadie
Cousin Fred
Young Day Lacks
Bill Watson
Sasha Walz
Sir Lord Keenan Kester Cofield
Richard Wilson
Young Woman
Paul Lurz
Teenage Elsie
Crownsville Administrator
Woman Pumping Gas
Turner Station Man
Toddler Deborah
Young Lawrence
Young Cootie (as Kermit Burns)
Ethel
Galen (as Linden Ronel Harris)
Young Sonny (as Jordan Elli Arellano)
Young Zakariyya (as De'Marco Michael Arrington)
Young Deborah
Christoph Lengauer
Scientist (uncredited)
John Hopkins Student (uncredited)
Archive Receptionist (uncredited)
Young Sonny (uncredited)
Newscaster (archive footage) (uncredited)
Country Girl Mae (uncredited)
Charlie (uncredited)
Rebecca's Co-Worker (uncredited)
Friend of Family (uncredited)
Nurse (uncredited)
Doctor (uncredited)
Church Member (uncredited)
Young Boy (uncredited)
Carl the Mechanic (uncredited)
Lacks Neighbor (uncredited)
Senior Scientist (uncredited)
John Hopkins Nurse (uncredited)
Cousin Josh (uncredited)
Pedestrian (uncredited)
Reporter (uncredited)
Henrietta Lacks Neighbor (uncredited)
Female Boss (uncredited)
Church Parishoner (uncredited)
First Administrator (uncredited)
Chris the Intern (uncredited)
Church Patron (uncredited)
Hospital Utility Worker (uncredited)
Counter Man (uncredited)