Robert Pattinson `got in role by wearing 1930s underwear`

The 24-year-old actor plays a vet who embarks on a love affair with Reese Witherspoon in the movie, and said that he was impressed by how authentic the set for the period film was.

He told Collider.com, 'I've never worked on anything so detailed. There was an embankment with a train track on the top. All the trailers were on one side, and then the circus world was on the other. Once you walked over the tracks, there would be a camera, but that was the only thing from the 21st Century.

'You could stand on the tracks and look over at everything, and you were in the '30s. We were out in the middle of the desert in Fillmore, and there was nothing else around. Jack Fisk, the production designer, used authentic pegs and the ropes. Every single thing which built the world was all totally real.'

'And, authentic period underpants do actually help, as well. I actually wore them every single day. Jacqueline West, the costume designer, was unbelievable. Almost everything was real. Every pair of jeans was all from the '20s and '30s. It was crazy.'