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Organisers have confirmed Olympic gold medallist Joss Christensen, of Utah, has signed up for the freeski slopestyle.
The event doubles as a round of the world cup, so will attract a star-studded field.
Other members of the American national team to have entered include the top two skiers on the Association of Freeskiing Professionals rankings for slopestyle, McRae Williams and Bobby Brown.
All eyes will be on Christensen, the dazzlingly talented 23-year-old who made the US team for Sochi as a coaches' discretionary selection and stunned everyone with his gold-medal performance.
He followed that up with silver at this year's Winter X Games in Aspen.
Christensen won gold in freeski big air at the 2011 Winter Games but he did not compete in 2013.
One of the top American women has also signed up for the Games.
Devin Logan is the AFP women's overall world champion and has won multiple medals at previous Winter Games.
The freeski events have become the hub of the biennial Otago wintersport event because they have the top level of sanctioning, platinum, from the AFP.
The sanctioning for all freeski disciplines - halfpipe, slopestyle and big air - puts the Winter Games on the same level as the X Games, Dew Tour, USSA Grand Prix and the Jon Olsson Invitational.
The fourth Winter Games begin on August 21.