Francis Albert Sinatra, also known as Frank Sinatra, was an American singer, actor, and producer. He became known for his smooth voice and charismatic charm and is considered one of the greatest artists of the 20th century. Some popular synonyms for Frank Sinatra include "Ol' Blue Eyes," a nickname given to him because of his bright blue eyes, "Chairman of the Board," a term used to describe his leadership in the music industry, and "The Voice," a reference to his mellifluous tone. Other descriptors include crooner, entertainer, legend, and icon. Regardless of the name used, his impact on popular culture and music remains unmatched.