Washington, June 6 -- Hollywood actor Matt Damon has described his upcoming epic 'The Odyssey' as the "hardest movie" he has ever worked on, while taking a break from filming reflections to spend time with rescue dogs at the Eastwood Ranch Foundation's Animal Rescue and Adoption Facility in Los Angeles this week.

The Oscar-winning actor spoke about the project in an interview during his visit for the California Adopt-A-Pet Day event on June 6.

Damon, who has five pets at home, spent time with rescue animals while supporting adoption awareness.

The actor also spoke about working with director Christopher Nolan on the film 'The Odyssey'.

"It was by far the hardest movie I've ever made. Chris likes to shoot everything real. So there's no...