Hollywood couple Emily Blunt and John Krasinski are teaming up for a new animation Animal Crackers.

According to Deadline, they will play on-screen couple Zoe and Owen Huntington who inherit a run-down circus and a magical box of Animal Crackers that turns anyone who eats them into an animal.

The star-studded cast also includes Ian McKellen, Danny DeVito and Sylvester Stallone.

Scott Christian Sava and Tony Bancroft will direct from a script by Sava and Dean Lorey.

Sava told Screen International about casting Blunt and Krasinski in the movie: "When Emily and John came in and performed their first scenes of the movie together... It was magic.

"I can think of no other way of describing what they brought to the film. We had to literally go back and re-storyboard the sequences because they took us to places we never dreamed. Owen and Zoe came to life when Emily and John spoke."