BBC Films speaks to two of the stars of X + Y, Asa Butterfield and Rafe Spall.

BBC Films talks to the stars of X + Y, Asa Butterfield and Rafe Spall

X + Y interviews with Asa Butterfield and Rafe Spall

BBC Films caught up with two of the stars of Morgan Matthews' X + Y, Asa Butterfield and Rafe Spall. Asa shares his processes and challenges with us and Rafe reveals what it's like to work with co-star, Sally Hawkins. The film is due for release on 13 March 2015 in the UK.

Interviews and editing Ravi Chopra.