Liza Minnelli is said to be making "excellent progress” at an undisclosed rehab facility, according to a spokesperson for the singer and actress. The 69 year old checked herself into rehab for the treatment of substance abuse, her spokesperson confirmed yesterday, while TMZ reports that alcohol is the main issue Minnelli is currently being treated for.

Liza MinnelliLiza Minnelli is being treated for substance abuse issues

"Liza Minnelli has valiantly battled substance abuse over the years and whenever she has needed to seek treatment she has done so," spokesperson Scott Gorenstein said in a statement. Adding that the actress was “currently making excellent progress at an undisclosed facility.”

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Minnelli is best known for her iconic role as singer Sally Bowles in the 1972 film Cabaret, for which she won the Academy Award for Best Actress. The entertainer is one of the few artists who can boast having an Oscar, a Tony, an Emmy and a Grammy win to their name.

The daughter of Hollywood legend Judy Garland and director Vincente Minnelli, Liza has been opened about her past substance abuse issues and has previously sought treatment for alcohol and painkiller addiction.

Minnelli has also battled several health problems over the years and last September she underwent back surgery to help heal an injury that had prevented her from performing recently and attending the funeral of friend Joan Rivers.

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TMZ also reports Liza was offered half a million dollars in 2010 to do the reality show ‘Celebrity Rehab', an offer which she ultimately passed on.