Lindsay Lohan has apparently left rehab after 23 days.

According to reports, the Mean Girls actress was ushered out the back door of UCLA's Medical Centre in Los Angeles to avoid the media glare.

Lindsay, 24, was ordered to spend 90 days in the facility after she was jailed for violating her probation on a 2007 conviction for driving under the unfluence.

It is believed she will continue to visit the hospital on an outpatient basis.

Lindsay, who is also known as Lilo, checked into the rehab facility at the beginning of August after serving just 13 days of her 90 day jail sentence. She was released early due to good behaviour and overcrowding.

Superior Court Judge Marsha Revel had also ordered Lindsay to serve 90 days in rehab. However, reports from the States say doctors at UCLA felt the ruling was excessive and recommended an early release.