Dirty, Sexy Money star Samaire Armstrong is receiving treatment for “personal issues,” the actress’ rep tells Usmagazine.com.

Her rep said in a statement: “Samaire Armstrong decided to enter an outpatient facility to deal with some personal issues in a therapeutic atmosphere and is doing very well. She continues to work on her show and will be completing her treatment in a matter of weeks.”

A source tells Us Armstrong, 26, will be absent from only one episode of the new ABC hit, on which she plays a character who is dealing with substance abuse issues.

“She stumbled a bit, but she’s back on set,” a source close to the show tells Us.