They're currently on the promo trail for Thor Ragnarok, but Mark Ruffalo, Chris Hemsworth and director Taika Waititi (who is visiting Dublin this Saturday) still have time for a bit of fun.

The trio were in Hemsworth's home country of Australia recently for the Aussie premiere of the film, and took part in a photoshoot in front of the iconic Sydney Opera House.

As Ruffalo points out, it bears a striking resemblance to a band photo and with that in mind, he asked Twitter for help in naming it.

Some suggestions were more helpful than others, as you'll see below: