Selma Blair -- Officially FIRED from 'Anger Management'

Chalk up a victory for Charlie Sheen ... 'cause Selma Blair has officially been 86'd from "Anger Management."

TMZ broke the story ... Sheen personally fired Blair over the weekend after hearing that she was complaining about his work ethic behind his back.

Sheen then went to producers and issued an ultimatum -- get rid of Selma ... or I quit.

Seems producers sided with Charlie -- 'cause Lionsgate, the studio behind the show, just released a statement saying, "We are confirming that Selma Blair will not be returning to Anger Management and we wish her the very best."