At the moment, Ennis’s nickname has not been revealed by ITV.
Express.co.uk will update this article when more information is available.
Outside of The Chase, Ennis is an Irish scientist, currently working as a postdoctoral researcher at Oxford University.
According to Radio Times, Ennis primarily studies the brains of insects.
He previously worked at Concordia University in Montreal, as well as at the National University of Ireland, Maynooth.
Ennis is active on Twitter, @bones_giles where he has been recently tweeting interesting facts about musicians, penguins and science.
His Twitter bio reads: “I do science and occasionally quizzes. Send me terrible jokes.”
Fans will have to wait until Ennis makes his debut on The Chase to find out more.
The Chase airs weeknights at 5pm on ITV.