Rachel McAdams thinks Lindsay Lohan is a natural actress.

McAdams - who starred alongside Lindsay in 2004’s Mean Girls - said she was surprised by how well the then-17-year-old star took direction on board, but admitted Lindsay loved to go out all the time.

“I just remember marveling about how much she knew as an actor, how much she understood,” the 31-year-old said. “She did very few takes and had this naturalness to her. And beyond that, I was 26 at the time. I’d be asked, ‘Where do you go out?’”

Rachel - who plays the role of Irene Adler alongside Robert Downey Jr. and Jude Law in Guy Ritchie’s new movie Sherlock Holmes - also said she wasn’t into the showy side of the celebrity lifestyle and is making an effort to be more eco-conscious.

“I don’t really desire things. I prefer to spend my money on experiences, on meals or travel. I look at the world through a green lens now, but you can’t make yourself crazy,” she added to Vogue. “That feeling of green guilt can be really inhibiting. It’s about a changing mind-set, remembering to turn off the water when you are brushing your teeth.”