Who's that pig out on the tiles in London town?
We're more used to seeing this star in corsets and petticoats - or at least girlie swashbuckling attire - on-screen, and her tiny frame is usually encased in couture on the red carpet.
Without the mask we reckon we'd recognise this pretty girl's pout almost anywhere.
Guessed it yet?
It's none other than our very own Keira Knightley.
The Hollywood actress and pals donned the pig face masks to travel incognito to and from her 21st b'day bash at London's trendy Glass Bar on Sunday night.
But photographers managed to snap the beauty looking every inch the starlet when she removed her pig face.
She was sporting gorgeous pincurls in her hair and bright red lippy to go with her 1920s flapper-style outfit.
The bizarre masks also enabled mates to slip into the party unnoticed - perhaps including Pride And Prejudice beau Rupert Friend?
But we reckon those masks came in most handy at the end of the night - what a clever way to cover up the one-too-many-sherberts look.
Somehow we don't think it'd be quite the same if we tried it on the no.42 bus home on a Saturday night.
Social bookmarking allows you to save and categorise a personal collection of bookmarks and share them with others. This is different to using your own browser bookmarks which are available within your web browser.
Use the links on the left to share this page on the social bookmarking site of your choice.
Read more about social bookmarking at: Wikipedia - Social Bookmarking