McAvoy previously played the title role in the opening production of director Jamie Lloyd's first Trafalgar Transformed season, Macbeth, and his return now marks the final production in Lloyd's second season there.

In a press statement, he said, "I had an incredible time in Trafalgar Transformed's Macbeth and couldn't wait to find something else to work on with Jamie Lloyd. Jamie, his producing partners and their team are committed to making theatre that is accessible to all. I love being a part of that and it has been great to see them transform the demographic of their West End audience, not least with the inspiring £15 Mondays initiative. I can't wait to play this challenging role in Barnes' forgotten masterpiece. This play combines all the things that Jamie's seasons are about, and for me what theatre is when it's at its best: it is wild, funny, shocking, subversive and brutal, and, most importantly, entertaining."

McAvoy will play Jack, a possible paranoid schizophrenic with a Messiah complex, who inherits the title of the 14th Earl of Gurney after his father passes away in a bizarre accident. Singularly unsuited to a life in the upper echelons of elite society, he finds himself at the centre of a ruthless power struggle as his scheming family strives to uphold their reputation.

McAvoy, who is a BAFTA-winning and Golden Globe-nominated actor whose films include "Filth," "The Last King of Scotland," "Atonement" and "X-Men," has also previously appeared on the West End sage in Lloyd's production of Three Days of Rain and in Breathing Corpses (Royal Court), Privates on Parade (Donmar Warehouse) and Out in the Open (Hampstead).

The production will be designed by Soutra Gilmour, with lighting by Jon Clark and sound by Ben and Max Ringham. To book tickets, which go on sale to members Oct. 27 and are on general sale from Oct. 29, contact the box office on 0844 871 7632 or visit www.trafalgartransformed.com.