Lucy and Ricky Ricardo, also known simply as Lucy and Ricky or the Ricardos, are fictional characters from the American television sitcom I Love Lucy, portrayed respectively by Lucille Ball and Desi Arnaz. The Ricardos also appear in The Lucy–Desi Comedy Hour, and Lucy also appears in one episode of The Ann Sothern Show. Together, Lucy and Ricky serve as a double act. Ricky is the straight man, a character similar to Arnaz himself; he is a Cuban-American bandleader whose trademark song is "Babalu". Red-haired Lucy is his wife, who always gets into trouble and is usually caught at it by Ricky.

Source: Wikipedia