Tony DiMaio/Shooting Star
10/15/2007 at 01:00 PM EDT
After spending the summer in rehab, Lindsay Lohan
is back in Los Angeles to shoot a movie.
The onetime party girl, 21, arrived over the weekend and had a low-key evening with friends Sunday, seeing the movie Elizabeth: The Golden Age
and visiting a tanning salon.
Lohan was due this week on the set of the tango-themed film Dare to Love Me,
the film for which she was preparing in July when she was arrested for DUI.
Lohan's mother Dina says her daughter is eager to get back to work, telling PEOPLE, "Lindsay is very happy and her life is back in control."
Earlier this month Lohan checked out
of the exclusive Cirque Lodge Treatment Center in Utah, where she has been since August.
She still has to serve her 24-hour jail sentence
arranged as a plea deal in the drunken-driving case.
Meanwhile, Lohan filed a legal action against a man who is suing her over a car accident in West Hollywood in 2005.
Raymundo Ortega has claimed Lohan was negligent – allegedly looking over her shoulder for paparazzi rather than watching the road – when her Mercedes-Benz collided with his van. But in her filing last week, Lohan claims it was Ortega who was negligent.
Reporting by DAVID CAPLAN