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.