Brooke MuellerCharlie Sheen's estranged wife Brooke Mueller has checked into rehab after a week of bizarre behavior.

TMZ reports that Mueller entered rehab after a week of alleged drug binging.

On Friday, it was reported that Mueller had refused to do a drug test even though it was required under the terms of her custody settlement with Sheen.

The 33-year-old has reportedly entered rehab as a precautionary step should Sheen's lawyers bring up the drug test issue in court.