The supernatural action drama is based on 2010 movie Legion.
But he’s not the only local face to land a role, with former Neighbours star Alan Dale also cast. US actor Tom Wisdom is also cast.
Egan will play Alex Lannen, a maverick soldier who learns that he is the saviour of humanity.
Deadline reports “Dominion picks up in the aftermath of a catastrophic war between an army of angels and mankind that has transformed the world. Set against a backdrop of the ultimate celestial battle as it touches down on earth, the series follows the perilous journey of Alex Lannen (Egan), a rebellious young soldier who discovers he’s the unlikely savior of humanity.”
Egan has previously had US work on Pretty/Handsome, Kings, Beauty and the Beast and Gothica.
Dale plays Rysen, the general who led the humans to victory against the angels during the Extermination War but is now ruler of Vega.
The pilot is set to begin shooting later this month in Cape Town, South Africa.