A new Game of Thrones trailer contains enough of the show's trademark sword-swinging and steaminess to fire up followers of the bloody fantasy show - particularly those who like dragons.

The full-length season five trailer centres on everyone's favourite mother of dragons and breaker of chains Daenerys Targaryen, played by Emilia Clarke.

In an unsettlingly calm voice, Daenerys labels the show's prominent houses - the Lannisters, Baratheons, Starks and Tyrells - as "spokes on a wheel".

"On and on it spins, crushing those on the ground," she muses.

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And as one of her now-hulking dragons soars across the screen, she declares her intention to shake things up across the seven kingdoms.

"I'm not going to stop the wheel - I'm going to break the wheel."

Runaways Tyrion Lannister and Arya Stark, portrayed by Peter Dinklage and Maisie Williams, also appear in the clip.

The trailer was first screened at Apple's launch event in the US for the new Apple Watch.

At the event the tech giant announced a partnership with Game of Thrones producer HBO that makes Apple TV the exclusive set top streaming box for HBO Now content.

Game of Thrones: Season Five airs on Soho on April 13.

Read more: Game of Thrones: Season five spoilers leaked
- AAP