Thanks to that great thing that is Twitter, it appears that Helen Slater shooting Supergirl begins tomorrow — well, actually today, since it’s after midnight at the time this article was posted. It hasn’t been revealed yet who the former Supergirl will be playing, but our money is still on Kara’s adoptive mother on Earth, Mrs. Danvers, especially since Laura Benanti has already been cast as Kara’s Kryptonian mother, Alura, and the “Helen Slater as Lara” thing happened already on Smallville.
Here’s what she Tweeted about it… unless we misunderstood her Tweet, and she thought shooting in general started the next day.
With the beautiful Melissa Benoist. Shooting starts tomorrow. #supergirl. pic.twitter.com/5KKrniRgSi
— Helen Slater (@HelenSlaterNYC) March 5, 2015
In other cool news, Supergirl Executive Producer Ali Adler posted a cool photo of the Supergirl production chairs (is there a better word for this?) on her Instagram page. You can see that below:

MysticJeddai
March 5, 2015
Just any old chair. Without a name, no big deal.
Charles David Haskell
March 5, 2015
I can’t wait to learn what role that Helen Slater will play on Supergirl. I still hope that Ms. Slater will become an regular on the series. The chair don’t tell what her role will be. Good luck to the pilot and I still hope that CBS will pick up the series.
Craig Byrne
March 5, 2015
I think it’s a very big deal. I love the Supergirl logo on it!