Fiennes joins the film, which has been in development hell since 2011
Ralph-fiennes
Altitude Film Entertainment has acquired international sales rights
Keira Knightley and Matt Smith also star
Emma Thompson, Ralph Fiennes and Tom Holland will voice some of the animals
Ferrell plays the titular detective in the film
The film opens in New York and Los Angeles on May 4 and in select theaters nationwide on May 13
The latest feature from Joel and Ethan Coen hits theaters February 5
The spin-off is set to swing into theaters May 26, 2017
Fox Searchlight Pictures will release the film in March of 2016
