Emma Thompson on Poppins role
28 November 2013 Last updated at 00:03 GMT
"He was glass full, she was glass empty"- that is how Emma Thompson has described Mary Poppins creator P.L Travers and Walt Disney.
She plays Travers to Tom Hanks' Disney in new film Saving Mr Banks, which charts the making of the famous film and the somewhat tricky relationship between the two.
The BBC's Tim Masters spoke to Emma Thompson about taking on the character.