The Hollywood actor hit headlines on Saturday (25Apr15) when he attended an autism charity event in Los Angeles sporting a painful-looking gash below his left eye.

Pitt has now explained the injury, revealing he fell over on a set of stairs at home and landed face first.

He says in a statement, "This is what happens when you try to run up steps in the dark, with your arms full, wearing flip flops. Turns out if you then try to stop your forward momentum with your face, the result is road rash. Regardless, I wasn't going to miss the Autism Speaks benefit the night after - wonderful people and I was honoured to be a part of this important event."