Bobby Darin was a popular American singer, songwriter, and actor in the 1950s and 1960s. He was known as a crooner, a term used to describe a male singer who sings romantic ballads in a smooth, soft style. He had a number of hits, including 'Mack the Knife' and 'Beyond the Sea'. His career spanned multiple genres, from jazz and pop to folk and country. He was also an actor, appearing in films such as Come September and Pressure Point. Bobby Darin's real name was Walden Robert Cassotto, but he changed it to Bobby Darin when he began his singing career.