"Will Arnett and Katherine Heigl Talk THE NUT JOB, Creating the Voices for Their Characters, Collaborating with the Director and Animators, and More". Interview with Sheila Roberts, collider.com. January 16, 2014.
"Erin O'Connor: 'I burnt my parents' lovely new kitchen down. But they forgave me in the end'". Interview with John Hind, www.theguardian.com. May 14, 2011.