Tom Hanks & Emma Thompson: 'Saving Mr. Banks' Trailer!

Tom Hanks and Emma Thompson star in the trailer for their upcoming film Saving Mr. Banks.

Inspired by true events, the film is the untold story of how the classic Mary Poppins made it to the screen – and the testy relationship that the legendary Walt Disney (Hanks) had with author P.L. Travers (Thompson) that almost derailed it.

Colin Farrell, Paul Giamatti, Ruth Wilson, Rachel Griffiths, Jason Schwartzman, Bradley Whitford, and B.J. Novak also star in the film, which will hit theaters on December 13.