Farah broke his hand playing for the Tigers against Penrith in Round 16 a week and a half ago.
He had surgery last week and was hopeful of making a miracle comeback for the decider in Brisbane, but NSW insiders say he was never a realistic chance of playing.
Ennis, who played the last of his seven Origin games in 2011 before being supplanted by the Tigers rake, is understandably rapt at getting another chance on the game's biggest stage.
The Sharks hooker has been with the Blues squad since it went into camp last week, but wasn't officially named in the side until tonight after a loophole allowed him to serve a one-match ban for Cronulla.
