As you might have noticed, superheroes are all the rage at the moment, and the enthusiasm extends well beyond the multiplex.  There are a number of comic book-sourced shows on television right now, and CBS is hoping to get in on the fun with a Supergirl TV showArrow executive producer Greg Berlanti and No Ordinary Family alum Ali Adler are spearheading the pilot, and a new casting breakdown has revealed what their take on Supergirl entails—assuming CBS orders the show to series, that is.  More on the show’s two major characters after the jump.

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Casting is now underway for the Supergirl pilot, and per TV Line, there are two lead roles that they’re looking for first: Kara Zor-El, aka Kara Danvers, and Alexandra “Alex” Danvers.  For the role of Kara, aka Supergirl, producers are looking at Caucasian females ages 22 to 26 to play 24.  Here’s how they describe the character:

As the series’ mythology goes, Kara at age 12 was sent from her dying home planet of Krypton to Earth, where she was taken in by the Danvers, a foster family who taught her to be careful with her extraordinary powers. After repressing said skills for more than a decade, Kara is forced to bust out her super moves in public during an unexpected disaster. Energized by her heroism for the first time in her life, she begins embracing her abilities in the name of helping the people of her city, earning herself a super moniker along the way.

As for Alex, Kara’s “gorgeous, brilliant, science-minded” foster sister, here’s that character breakdown:

Growing up, Alex was partly jealous of her sibling yet also fascinated by her abilities, prompting Alex to learn as much as she could about alien anthropology, sociology and culture. Today, Alex works for a secret government organization and, alongside her heroic sis, will face many challenges, both mundane and super.

The pilot is in contention for a spot on the Fall 2015-16 schedule, so don’t expect to hear word on whether it’s going to series before next spring, likely right before the network upfronts in May.