Ian McEwan is touting a developing opera adaptation of “Atonement,” his 2001 novel that also was the basis for the 2007 pic that starred Keira Knightley.

McEwan said in a public discussion held Thursday in London that he was at work on the project with composer Michael Berkeley and librettist and poet Craig Raine.

Last year McEwan penned the libretto for chamber opera “For You,” also composed by Berkeley. The pair previously collaborated on a 1982 oratorio called “Or Shall We Die?”

Storyline of “Atonement” follows the aftershocks of a young girl’s misunderstanding, with locations ranging from an English manor to the French countryside in WWII. Pic was nommed for seven Oscars, nabbing one for music.

No production timeline has been confirmed, but McEwan said there have been discussions with opera troupes in the U.S., England and Germany for a potential 2013 preem.