Lindsay Lohan was spied partying in Los Angeles at the weekend – just weeks after leaving rehab.

The ‘Mean Girls’ star was spotted in the toilets of the plush Hollywood Roosevelt hotel where she had been partying at exclusive nightclub Teddy’s on Saturday night

“She looked really thin and tired, although it was quite difficult to tell if she had been drinking. Most of the other girls were surprised when they found out they had been sharing a rest room with a Hollywood A-lister,” one snitch says.

“She tried not to look at anyone as she left, but one girl noticed her and said, ‘That was Lindsay Lohan! Hasn’t she just come out of rehab?’ ”

After her trip to the toilets, Lindsay, 20, was seen heading back to the nightclub.

It is not the first time the ‘Bobby’ star has enjoyed an evening at Teddy’s since leaving Los Angeles’ Wonderland rehab center on February 16.

Lindsay performed a DJ set there last month before leaving with ‘Jackass’ star Steve-O.