London, Aug 18 (IANS) Hollywood actress Lindsay Lohan is spending most of her time sketching while in rehab, according to her mother Dina.

Dina revealed Lindsay is making good progress since she left prison and entered the UCLA Neuropsychiatric Hospital in Los Angeles to complete a court ordered 90-day treatment programme.

'Yeah, she's wonderful, we're great, we're good. Lindsay's busy every day, actually, sketching,' contactmusic.com quoted her mother as saying.

'She's just thankful and grateful to all of her fans. They have been sending her letters and cards, and Lindsay has been answering them, so we're really pleased about that.'

The actress checked into rehab soon after she was released from the Century Regional Detention Centre in Lynwood, California, Aug 2 after completing 15 days of her 90-day jail sentence, following the violation of probation terms of her 2007 arrest.

Lindsay is likely to walk free from the rehab this week. As the doctors feel that her psychiatric problems are not nearly as serious as they first thought.

However, if her release is approved by the court, she will still have to visit the centre as an outpatient.