EXCLUSIVE: Jason Isaacs, probably best-known as Lucius Malfor in the Harry Potter franchise, has signed onto Thunder Road Pictures and Arclight Film’s Hotel Mumbai which is based on the 2009 documentary Surviving Mumbai — a true story of the 2008 Pakistani terrorist attacks on the Taj Mahal Palace Hotel in India. The film about the tragic siege and loss of life is being directed by Anthony Maras and was written by John Collee and Maras.

Dev Patel, Armie Hammer and Nazanin Boniadi of Homeland are also on-board to star in the film which was a horrible tragedy. For 68 hours, hundreds were held hostage as shots rang out admist a raging fire. More than 160 people died and as in Hotel Rwanda, it was the courageous actions of a few that prevented a much higher death toll in the hotel itself.

Basil Iwanyk is producing through Thunder Road and Gary Hamilton and Mike Gabrawy produce through Arclight. Electric Pictures’ Andrew Ogilvie also produces as does Julie Ryan. Thunder Road’s Kent Kubena and Jonathan Fuhrman will exec produce along with Patel.

The picture was picked up by The Weinstein Company in Cannes this year, acquiring both North American and UK rights.

Isaacs, who is also said to be in discussions with Assaf Bernstein’s Behind the Glass, just wrapped production on Armando Iannucci’s film The Death of Stalin where he played the character of Zhukov.

Other upcoming releases for the actor include Red Dog: True Blue, Gore Verbinski’s A Cure for Wellness and the animated feature Happy Family.

Isaacs, who is also well-known for his role as Michael Caffee in the TV series Brotherhood, is repped by The Gersh Agency, Silver Lining Entertainment and Independent Talent Group.