Lindsay Lohan checks into rehab, source says

( CNN) -- Actress Lindsay Lohan has decided to check herself into a substance abuse rehab program in the next few days, a source close to the actress said Sunday.

Lohan’s decision came two days after a Los Angeles judge ordered her to jail without bail in the wake of a failed drug test. Another judge allowed her to post a bond Friday evening.

It was not immediately clear which rehab program Lohan would enter, said the source, who asked not to be identified because the source was not authorized by the actress to release the information.

Lohan spent 23 days in a court-ordered rehab program at Ronald Reagan UCLA Medical Center last month, following 13 days in a Los Angeles County jail.

“Substance abuse is a disease, which unfortunately doesn’t go away over night,” Lohan wrote in a September 17 Twitter message. “I am working hard to overcome it and am taking positive steps.”