Suzanne Somers (born Suzanne Marie Mahoney, October 16, 1946) is an American actress, author, singer, businesswoman, and health spokesperson. She is best known for her television roles as Chrissy Snow on Three's Company and as Carol Foster Lambert on Step by Step.

Somers later became the author of a series of best-selling self-help books, including Ageless: The Naked Truth About Bioidentical Hormones (2006), about bioidentical hormone replacement therapy. She has released two autobiographies, four diet books, and a book of poetry.

She has been criticized for her views on some medical subjects and her advocacy of the Wiley Protocol, which has been labelled as "scientifically unproven and dangerous". Her promotion of alternative cancer treatments has received praise from naturopathic health practitioners and criticism from the American Cancer Society.