Dean Cain and Helen Slater cast in upcoming Supergirl show

Supergirl has yet to air a single episode, but we're already excited about the CBS series about a female superhero who has to learn to use her powers after disguising them for half of her life. But fans of the DC Comics character now have another reason to tune in: super-casting.

The upcoming show will be tipping its hat to former Superman-based movies/TV shows by casting former Supergirl Helen Slater (who starred in the 1984 movie Supergirl) and ex-Superman Dean Cain (who starred in the 1993-1997 TV show Lois and Clark: The New Adventures of Superman).

DC Comics isn't revealing who Slater and Cain will be playing, but considering star Melissa Benoist was tapped a little over a month ago, it seems as if CBS is still casting major roles—leading us to speculate that Slater and Cain will be making more than brief cameos.

To celebrate the event, Benoist posted a photo of Supergirls past and future together:

This isn't the first time a superhero TV series has recast some familiar faces. Christopher Reeve and Margot Kidder (from the 1978 Superman and others), Teri Hatcher (Lois and Clark) and even Cain and Slater had appeared in Smallville, the 2001-2011 WB show.

Supergirl will be airing in fall 2015.

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