Day and Scott teamed for victory at the last World Cup in 2013. They will once again comprise the Australian team later this year when the event heads to Kingston Heath Golf Club in Melbourne, Australia.
While the event's last iteration included both individual and team competitions, this year's tournament will only include a team competition.
"The victory at the 2013 World Cup of Golf was a kick-start to a phenomenal stretch of golf for me," Day said in a release. "I am truly looking forward to the new format with Adam. I really can't imagine a better scenario than to represent Australia in our home country, with one of my good mates at Kingston Heath, one of my all-time favorite courses."
Other notable commitments include Bubba Watson, who will anchor the American team, while Danny Willett will team with fellow Englishman Lee Westwood, who finished second to Willett this year at the Masters.
A total of 28 countries will be represented at the event, each fielding a two-man team. Players currently listed without a partner have until Aug. 26 to choose who they will team with in the event.
Here's a look at the players who have confirmed their participation:
Australia: Jason Day and Adam Scott
U.S.: Bubba Watson
England: Danny Willett and Lee Westwood
Scotland: Russell Knox and Duncan Stewart
Japan: Hideki Matsuyama
Spain: Rafael Cabrera-Bello
Korea: Byeong-Hun An
Argentina: Emiliano Grillo
Ireland: Shane Lowry
Sweden: Alex Noren and David Lingmerth
Thailand: Thongchai Jaidee
New Zealand: Danny Lee
Italy: Francesco Molinari
Austria: Bernd Wiesberger
Netherlands: Joost Luiten
South Africa: Jaco van Zyl
Venezuela: Jhonattan Vegas and Julio Vegas
Wales: Jamie Donaldson
France: Victor Dubuisson
Germany: Alex Cejka
Fiji: Vijay Singh
Portugal: Ricardo Gouveia
Canada: David Hearn
China: Wu Ashun
Paraguay: Fabrizio Zanotti
Philippines: Miguel Tabuena