Casting HBO's Green Lantern Corps

As proven across her career, Alexander is pretty capable when it comes to playing badasses - whether they be heroes or villains. Star Sapphire lies somewhere in-between the two, making Alexander right for the job.

Of course, this is not the only layer that the character has to offer, her stories having a surprisingly large focus on mental health alongside general anti-heroics.

This additional element is not something that Alexander's previous work has necessitated, making the role of Ferris a different prospect compared to the actor's more familiar roles.

An unknown quantity like this may make her casting a risky one, but if the juxtaposition between her appearances in the Thor films and lesser known oddities like 'Kyle XY' prove anything, it's that her talent is adaptable, and could do justice to a role like Star Sapphire.