Guardians of the Galaxy Vol. 2 movie billboards...

After blowing up the box office with their unique brand of out-of-this-world action, humour, alien characters and a killer soundtrack, the Guardians of the Galaxy return to the big screen with a second volume of superheroic hits.

For their first outing their outdoor advertising certainly referenced Star Wars liberally, but this time around the plucky band of misfits seem to be leaning into their alienness and embracing their comedic qualities for their cinematic sequel.

Coming together to defeat the Kree Accuser 'Ronan' in their first adventure, 'Star-Lord' (Chris Pratt), 'Gamora' (Zoe Saldana), 'Drax' (Dave Bautista), 'Rocket' (voiced by Bradley Cooper) and 'Baby Groot' (voiced by Vin Diesel) are back with another awesome mixtape to accompany their ongoing misadventures in the outer reaches of the cosmos.

This time around we'll learn more details about 'Star-Lord/Peter Quill's' parentage, face new intergalactic threats and see more fan-favourite cosmic characters leap from the pages of Marvel's comic books, like Pom Klementieff's 'Mantis' and Kurt Russell's 'Ego The Living Planet'.

Even old foes like 'Nebula' (Karen Gillan) and 'Yondu' (Michael Rooker) may have to become necessary allies to help keep their newfound family together.

Marvel Studios movies just keep getting better and better as each director, cast and crew push the boundaries of storytelling, visual effects and characterisation, and deliver fun, action-packed adventures that seem to please fanboys and the masses alike.

Who knew that these mostly D-List cosmic comic book characters would one day be the stellar rock stars of the Marvel Cinematic Universe they've become.

These psychedelic Guardians of the Galaxy Vol. 2 movie billboards were spied around the streets of L.A., along Santa Monica Boulevard, Beverly Boulevard, La Brea Avenue, Pico Boulevard and La Cienega Boulevard, from April 4 to April 14, 2017.

The giant-sized billboard was first snapped rocking out the Sunset Strip in a riot of colour on April 4, 2017.

Fans of Marvel's cosmic heroes can also check out these Guardians of the Galaxy movie billboards from 2014.

Meanwhile Marvel Comics aficionados can also check out all these other movie and TV show billboards based on their iconic characters.

Fans of Chris Pratt can also enjoy these Passengers movie billboards and these Jurassic World movie billboards, whilst admirers of Zoe Saldana can check out this Calvin Kelvin underwear billboard, this Colombiana movie billboard and these Star Trek movie billboards.

GOTG Vol. 2 is already tracking to be another huge hit, so let's see if this installment will be as popular as dancing Baby Groot turned out to be in the team's origin story.

UPDATED: Fans can also enjoy these original movie costumes from Guardians of the Galaxy Vol. 2.

Plus these vibrant street posters snapped along La Brea Avenue on April 19, 2017, also offer a glimpse at all your favourite GOTG characters, new looks like Yondu's head fin and new cosmic additions like Mantis.

UPDATED: The Guardians of the Galaxy are making the most of Disney's slim movie slate this summer by taking over the company's regular giant ad site along the rocking Sunset Strip to highlight their film sequel's release on digital and Blu-ray.

This super-sized billboard for Vol. 2 was photographed making a bold statement in the skies of West Hollywood on July 31, 2017.