Lindsay Lohan in Labor PainsLindsay Lohan has reportedly been acting the consummate professional on the set of her new film Labor Pains.

The actress has been criticised in the past for calling in “sick” or turning up late to previous film sets when she had been partying the night before but a source from the set of the new comedy has said that she’s very much settled down.

The source told the New York Post: “She’s showing up early for call time, she knows her lines and her co-workers actually like her. She’s a total pro now.”

The source added that Lindsay’s BFF/rumoured girlfriend Samantha Ronson is the reason behind the change as she has a “calming effect” on the actress and has helped her move away from bad influences from the Los Angeles party circuit and also within her advisory group.

The new film sees Lindsay star as a somewhat inept employee who pretends to be pregnant to avoid getting fired from her job.