Russell Crowe has sparked a furore after claiming to have photographed a UFO outside the window of his office.

The Hollywood megastar posted a video on YouTube which he says could show a spaceship moving across the night sky.

The actor seems to have anticipated that some would be sceptical of his supernatural claims, as the clip was captioned 'THESE ARE REAL'.

Scroll down to watch the video

UFO? Russell Crowe posted this picture of a mysterious light in the sky online yesterday

Mr Crowe, star of blockbusters including Gladiator and Les Misérables, put the video online yesterday.

He titled it: 'UFO? Time Lapse Photos Outside RC's Woolloomooloo Office (THESE ARE REAL!)'

The clip is a montage of five photographs apparently taken seconds apart, with a flash of red and yellow light moving across the screen.

The source of the light appears to be suspended in the sky above the trees which are the main focus of the images.