Viggo Mortensen brought his own canoe and plants to the set of 'Captain Fantastic'.
The 57-year-old actor - who plays a father-of-six raising his children in the forest - likes to "offer up" his own personal items to be used in his movies where he thinks they could be appropriate, and had a lot to offer the family saga.
He said: "I like to offer up things of my own that might be appropriate.
"Many of the books you see on the bus and in our home are books I brought.
"There's also my canoe, things from the kitchen, knives, and clothes. I brought a lot of plants from the garden."
And director Matt Ross found his leading man was very well-prepared in his research for the film, having sent him a stack of books by award-winning scientists and philosophers, only to find he didn't need to have done so.
He told Total Film magazine: "I thought that was a great way to frae some of the knowledge that this family would have.
"It turns out Viggo had read all the books already."
Viggo added: "I didn't have to do a ton of research about living in the forest and being comfortable in nature."