As previous Smallville spoilers have revealed, the Justice Society will be making an appearance on this CW hit.

Now, thanks to IGN TV, we've learned the precise characters that will appear in the episode penned by comic book writer Geoff Johns.

First up, Michael Shanks will portray Hawkman. The actor - seen below alongside the iconic Justice Society member - was most recently seen in Burn Notice and Stargate SG-1.

Secondly, Brent Stait will take on the role of Doctor Fate. The Canadian actor was recently seen in The L Word and has guest-starred on Supernatural.

The third Justice Society member will be Stargirl. She'll be played by Britt Irvin, who has also appeared on Supernatural and will star in the upcoming CW series Life UneXpected.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.