Undead hordes spotted on the streets of London... but don't worry it's just World Zombie Day

Ronald? A participant for World Zombie Day, London

Matthew Chattle/REX Shutterstock

The streets of London were today filled with packs of shuffling, blank-eyed drones emitting low moans of pain as they clawed past each other.

But no, the horrifying scene wasn't just the Piccadilly Line at rush hour. The walking corpses were out in force to celebrate World Zombie Day 2015, a celebration of all things undead.

Dozens of fans of horror flicks like Dawn Of The Dead and TV shows like the Walking Dead descended on the capital today and dragged their lifeless bodies around, posing with delighted tourists.

Some of the more bizarre costumes include a zombie Nazi soldier, zombie newlyweds, a zombie Mexican, a zombie clown and even a zombie Smurf.

Dead love: An undead couple pose for the camera

Matthew Chattle/REX Shutterstock

Day of the Dead: The event is celebrated throughout the world

World Zombie Day is an international annual event that grew from Pittsburgh’s first Zombie Walk at Monroeville Mall in 2006 – the site where George Romero filmed Dawn of the Dead.

The aim is to help all fans of zombie culture come togetheras well as relieve hunger and homelessness through charity fundraising. The London event supports homelessness charity St Mungo's Broadway .

More than 50 cities worldwide participate in World Zombie Day, including New York, Pittsburgh, Paris, Hong Kong, Los Angeles, Chicago, Dallas, Seattle, and Tokyo.