Shia LaBeouf has apparently caused some raised eyebrows by refusing to shower for weeks on the set of his Second World War drama Fury.
The Transformers actor was so determined to get fully into character as a soldier in the trenches that he stopped washing and even yanked out his own tooth, reported the Mail On Sunday.
And it seems Shia's behaviour even earned him a talking to from his co-star Brad Pitt.
A source said: "Shia drove everyone mad on set trying to prove that he was the most dedicated star.
"He pulled out his own tooth during the first few weeks of filming and then refused to shower for weeks on end so he could better understand how his character would have felt living in the trenches."
The insider went on: " Shia was warned about his behaviour by several people on set, including Brad Pitt and director David Ayer.
"He didn't heed any of their warnings and found himself staying in a small bed-and-breakfast hotel away from the rest of the cast."
Shia, 27, stars in Fury alongside Brad, Logan Lerman, Jon Bernthal, Michael Pena and Jason Isaacs.