Charlie Sheen back at work on 'Two and a Half Men'

NEW YORK — Charlie Sheen is back at work and shooting has resumed on "Two and a Half Men."

His agent, Stan Rosenfield, says Sheen returned to the Warner Bros. set in Burbank, Calif., on Tuesday morning.

The 44-year-old actor voluntarily entered a rehab facility "as a preventative measure" that temporarily halted production of CBS' top-rated sitcom last month.

Sheen still faces legal problems arising from a fight with his wife in Aspen, Colo., in December. He is charged with assault, criminal mischief and menacing, which carries a possible sentence of one to three years in prison.

Sheen pleaded not guilty to domestic violence charges in Colorado's Pitkin County District Court on Monday. A judge scheduled a jury trial for July 21.