Emilio Estevez (born on May 12, 1962 in New York City, New York) and Charlie Sheen (born Carlos Irwin Estevez on September 3, 1965 in New York City, New York), as their birth names imply, are brothers.
Their father is Martin Sheen (born Ramon Antonio Gerard Estevez on August 3, 1940 in Dayton, Ohio), and their mother is Janet Sheen (born Janet Elizabeth Templeton on July 8, 1944 in Dayton, Ohio).
The Sheens have two other children: Renee Estevez (born Renee Pilar Estevez on April 2, 1967 in New York City, New York), and Ramon Estevez (born Ramon Luis Estevez on August 7, 1963 in New York City, New York) who are also in show business.
Michael Douglas (born Michael Kirk Douglas on September 25, 1944 in New Brunswick, New Jersey), the son of actors Diana Douglas and Kirk Douglas, and current husband of Catherine Zeta-Jones (born Catherine Jones on September 25, 1969 in Swansea, West Glamorgan, Wales, UK) is not related to the Sheen family. He does, however, have 3 children of his own, 2 with Zeta-Jones, and 1 with his previous wife Daindra Douglas (March 1977 to June 1, 2000).
In "that's what we expected" news, Fox CT is reporting that they have confirmation that Charlie Sheen, after his loud and angry break from the show, will not be returning in the final season of Two and a Half Men.