Guardians of the Galaxy aliens invade London

Nothing much fazes a London commuter. Though this scene may have raised an eyebrow or two.

Currently filming in the capital, some of the alien characters from 'Guardians of the Galaxy' were snapped shooting a scene on the Millennium Bridge.

A motley crew of bizarre alien creatures are seen fleeing over the Thames - though from what, we're not quite sure.

[The next 'Avengers?' - Guardians of the Galaxy announced]

'Avatar's Zoe Saldana - well, her body double (she was spotted elsewhere on set) - is among those legging it, along with some yellow guys, a blue chap and a pink lady with matching child. She plays Gamora, a green-skinned alien assassin.

Above them, in a disappointingly dull London sky, a chopper captured the action from the air.

Filming is well underway for the oddball Marvel Comics adaptation, largely at Shepperton Studios. Based on the comic series, it stars Chris Pratt as Peter Quill - a.k.a Star-Lord, the leader of the titular Guardians. They also include Dave Bautista's Drax - a vengeful knife-wielding warrior, Saldana's Gamora, Groot - an alien tree-creature rumoured to be voiced by Vin Diesel, and Rocket - a gun-toting Raccoon. So far he remains un-cast.

Rounding out the impressive cast are Glenn Close, Benicio Del Toro, Karen Gillan, John C. Reilly, Lee Pace, Michael Rooker and Djimon Hounsou.

With Marvel's earthbound heroes Iron Man, Thor, Captain America and Thor unlikely to carry on for many more solo movies (expect them to keep showing up in the 'Avengers' movies however), 'Guardians of the Galaxy' is the next phase of the comic book studio's cinema strategy.

The James Gunn-directed film is due out in August next year.