Actor Charlie Sheen in Rehabilitation Program

Actor Charlie Sheen has admitted himself into a monthlong alcohol and drug dependency rehabilitation program, his spokesman said Thursday.

Sheen, 24, is also “suffering from severe exhaustion due to an arduous filming schedule of four features back to back,” said his publicist, Jeff Ballard. Ballard, however, refused to divulge when Sheen entered the program or its location. He also declined to disclose the nature of Sheen’s substance abuse.

“After this 30-day period of rest and rehabilitation, Sheen returns to Los Angeles to fulfill several upcoming feature film commitments,” Ballard said.

Sheen, the son of actor Martin Sheen, has starred in such motion pictures as “Platoon,” “Wall Street,” “Young Guns” and “Navy Seals.”