The actress, who appears alongside the Twilight actor in Bel Ami, has insisted that Pattinson is a calm and centred man, despite the mania that surrounds him.
When asked if she had been caught up in the hysteria surrounding her co-star, she told Stylist: "No, you wouldn't have known. Robert Pattinson is the loveliest man - he's just so sweet."
Scott Thomas also praised her past co-stars and claimed that she has been very fortunate to have had such great acting partners.
She added: "I've been really, really lucky with my acting partners - there are lots - Mark Rylance, Ralph Fiennes, Katherine Parkinson, I'd also love to work with Mackenzie Crook again. He looks so delicate, but at the same time he's got this incredible strength to him - he's got this real power on stage."