Film fans and gaming addicts in the capital may have noticed an odd sight near Tower Bridge, a giant Alien Egg, Xenomorph and Marines.
Staged in celebration of the release of Aliens: Colonial Marines, Marines were seen hunting down a strange unsettling alien near the mayor's office and surprisingly it wasn't Boris they were looking for but a Xenomorph, hatched from a nearby giant egg.
The near 20-foot Alien egg was planted in London's Potters Field Park to the amusement of onlookers (pictured above).
Aliens: Colonial Marines landed in retailers nationwide today, so keep your eyes peeled for our upcoming review.
In the meantime, enjoy the following trailer from SEGA: