Russell Crowe stripped off and "wallowed" in mud with Cate Blanchett for their latest film. The stars are currently filming "Robin Hood" - based on the legend of the British outlaw - in the U.K. and have had a number of unusual experiences.

Russell, who plays title character Robin in the movie, said: "So far we have ridden horses together, seen off bad guys, got naked (partially) wallowed chin deep in mud, danced by firelight, attended a funeral and kissed. What can I say? It's an interesting gig."

Cate plays Robin's love interest Maid Marian - replacing Sienna Miller, who was originally cast in the role - and Russell has praised her professionalism, calling her his "partner in crime."

He added: "I can't talk highly enough of her skill and sense of humor. She is a wonderful partner in crime and now that we are under way, I can't think of anyone else in this part."

He also described the scale of the film, directed by veteran filmmaker Sir Ridley Scott as "gargantuan - the biggest I've ever worked with."