Nathan Fillion for Super

Nathan Fillion ( Firefly ) and Linda Cardellini ( Scooby Doo ) are joining the cast of James Gunn's Super .

Now, we are trying very much to keep our cool, but you know how it is. Fill-o-fans will understand.

The Fill - who also starred in Gunn's previous directing gig Slither - has been cast as the character that inspires the story's lead, Frank (Rainn Wilson) to become a superhero.



Gunn's latest project has cast of big hitters like Kevin Bacon ( Frost/Nixon ) and Liv Tyler ( Jersey Girl ) already on board.

Now he's busy upping the geek-ante with the always awesome Michael Rooker ( Slither ) and Andre Royo ( The Wire ) in addition to Fillion and Cardellini - and our geek-dar is spinning into excitement-overdrive as a result.

Does the line-up have you Gunn-ing for Super ? Let us know below...

The Total Film team are made up of the finest minds in all of film journalism. They are: Editor Jane Crowther, Deputy Editor Matt Maytum, Reviews Ed Matthew Leyland, News Editor Jordan Farley, and Online Editor Emily Murray. Expect exclusive news, reviews, features, and more from the team behind the smarter movie magazine.