'Perfect' Lindsay Lohan Impress Co-Star 7/31/08

Lindsay Lohan is obviously sticking to her promise of making a career comeback - co-stars in her forthcoming movie Labor Pains have branded the star's on-set behavior "perfect".

The actress and former partygirl was slammed by bosses on her previous movie, Georgia Rule, after she was continually late to set - with studio chief James G. Robinson becoming so infuriated he wrote a letter to the star attacking her unprofessionalism.

But the actress seems to have stayed on her best behavior while shooting the film, with co-star Jay Thomas claiming Lohan has been a dream to work with.

He tells E! Online, "I'm just guessing, but someone must have said to her, 'You better get your act together or else. "She was perfect. And she's a really good actress. I'm not just saying that because of the movie, but she really happens to be talented, and it looks like she's OK now."