The Thor movies are what they are because of Chris Hemsworth's performance, especially in Ragnarok where he got to align his comedic talents with Taika Waititi's 'out-there' sensibilities.

But while it's really hard to imagine anyone else as the God of Thunder now, before Hemsworth was cast, multiple actors were linked to the role to the point where concept art was created using other stars.

One such piece has now been shared by Marvel Studios' Visual Development veteran Charlie Wen, and features Kevin McKidd from Grey's Anatomy and Trainspotting.

Related: Grey's Anatomy stars pay tribute to "THAT scene" 15 years later

"Thought you might enjoy another very early Thor concept done even before preproduction started," he wrote on Twitter. "I was trying out different actors to base #Thor on since @chrishemsworth didn't have the role yet at the time. This was based on @therealkmckidd."

Apart from the different face, the design is pretty standard MCU Thor, which is just how we like it. Big red cape, not too armoured and with the big circles on his chest. Excellent.

Related: 11 things you didn't know about Thor

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Hemsworth will return as Thor in his fourth solo outing, Thor: Love and Thunder, which will see Natalie Portman return as Jane Foster and take on the mantle of the God of Thunder. Waititi is back directing as well.

McKidd is still a part of the Grey's Anatomy family, with his character Owen Hunt also popping up in a recent episode of spin-off series Station 19.

Thor: Love and Thunder has a release date of February 28, 2022.

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Thor concept art shows Grey's Anatomy star as the God of Thunder - Digital Spy