Shia LaBeouf's Nymphomaniac co-stars Uma Thurman and Christian Slater have defended the star's recent behaviour saying he's a natural-born artist.

Thurman told CBS News, "Oh, he's just going through something. He's an incredibly sweet and sensitive soul and I think a natural-born artist."

Slater also complimented the star saying, "Amazing, intense, passionate, gives a phenomenal, unforgettable performance in this movie and I love the guy."

LaBeouf made headlines recently by wearing a paper bag to a film premiere with "I am not famous anymore" written on it.