Sheryl Lee Ralph is an American actress, singer, and activist. She made her screen debut in the 1977 comedy film A Piece of the Action, before landing her breakthrough role as Deena Jones in the Broadway musical Dreamgirls, for which she received a Tony Award nomination for Best Actress in a Musical.
Sheryl Kara Sandberg is an American technology executive, activist, and author. She is the chief operating officer of Facebook and founder of Leanin.org. In June 2012, she was elected to the board of directors by the existing board members, becoming the first woman to serve on Facebook's board. Before she joined Facebook as its COO, Sandberg was vice president of global online sales and operations at Google, and was involved in launching Google's philanthropic arm Google.org. Before Google, Sandberg served as chief of staff for United States Secretary of the Treasury Lawrence Summers.