Did you see Gwyneth Paltrow's brilliantly meta Halloween costume?

Gwyneth Paltrow had the perfect Halloween costume this year, a throwback to one of her most talked about roles.

SPOILER ALERT for this 22-year-old film... At the end of Seven, Paltrow's head ends up in a box, causing her husband, detective Brad Pitt to shoot Kevin Spacey's John Doe in the head.

Paltrow proved she's got a good sense of humour with the costume below, posted on her Instagram.