Charlie Sheen has allegedly threatened to quit 'Anger Management'.

The 47-year-old actor, who plays therapist Charlie Goodson in the comedy series, has told producers that he will walk away from the FX show unless they fire Selma Blair, who portrays Dr. Kate Wales, immediately.

A source told gossip website TMZ.com that the actor returned to work on Monday (17.06.13), where he told producers he wants the actress's contract to be terminated as soon as possible because he believes that she has been trashing his work ethic behind his back.

The insider said that Charlie has accepted that firing someone suddenly is not an easy process but he wants the show's executives to start drawing up an exit strategy for his co-star.

Selma, who was not on the set on Monday, admitted she is in the dark about her potential termination, saying: ''I don't know anything.''

Executives at the FX network are currently said to be locked in talks as they scramble to come up with a solution for the situation.

The outspoken actor - who was fired from 'Two and a Half Men' in 2011 after his infamous hell-raising lifestyle got out of control - is said to be adamant he wants Mila Kunis to replace Selma.

He has apparently pitched a 10-episode storyline to producers with Mila and the 'Ted' actress will be offered $1 million per episode to take on the part.

Charlie, who is reportedly set to earn between $75 million and $200 million if he completes the 100-episode order for the series, has starred in roughly 50 episodes to date.