The first trailer for director Bryan Singer’s Jack the Giant Killer has gone online. Based on the classic tale, the fantasy pic tells the story of an ancient war that’s reignited when a young boy (Nicholas Hoult) unknowingly opens a gate between the world of the humans and the world of the giants. We don’t see much here, as it plays out very much like a teaser trailer, but I like the feel of it and it sure is nice to see Singer back doing big action set pieces. Ewan McGregor is the epitome of cool, and Hoult seems a fine choice to play the reluctant hero. Overall, I like the tone and the look of everything, but there’s not enough here to gauge whether or not Singer’s got himself a winner. I’m really looking forward to seeing those giants though.

Hit the jump to watch the trailer. The film also stars Eleanor Thomas, Stanley Tucci, Ian McShane, and Bill Nighy. Jack the Giant Killer opens in 3D IMAX on June 15th, 2012.

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Here's the official synopsis for Jack the Giant Killer:

Jack the Giant Killer tells the story of an ancient war that is reignited when a young farmhand unwittingly opens a gateway between our world and a fearsome race of giants. Unleashed on the Earth for the first time in centuries, the giants strive to reclaim the land they once lost, forcing the young man, Jack, into the battle of his life to stop them. Fighting for a kingdom, its people, and the love of a brave princess, he comes face to face with the unstoppable warriors he thought only existed in legend—and gets the chance to become a legend himself.