Most of the news sources consider this a done deal although the final contracts haven't been signed yet. I like the idea of a lesser known actor starring in the film. From Hoult eyes lead for 'Jack the Giant Killer' by Dave McNary:
Brit thesp Nicholas Hoult is in talks to topline New Line/Legendary's "Jack the Giant Killer," their twist on the "Jack and the Beanstalk" story with Bryan Singer directing.
Script by Darren Lemke centers on a the kidnapping of a princess, which threatens the long-standing peace between men and giants, and a young farmer who's given an opportunity to lead a dangerous expedition to the giant kingdom to rescue her.
Stanley Tucci recently signed on to play the villain and Bill Nighy and John Kassir have been cast as a two-headed giant.
Hoult broke into showbiz in 2002's "About a Boy," in which he played the nervous 12-year-old who complicates Hugh Grant's life, then appeared in teen drama "Skins." Recent feature credits include Tom Ford's "A Single Man," "Clash of the Titans."
Hoult will be seen this summer as a young Hank McCoy, aka Beast, in Matthew Vaughn's "X-Men: First Class."