The union looked smooth, as Irving showed off his world-class handles and silky jump shot while Anthony displayed his range.
Butler, who was traded to the Timberwolves this offseason, looked to be in mid-season form with several stylish drives to the rim.
Cavaliers fans will undoubtedly be giddy about watching Anthony ball out with Irving. The 10-time All-Star has been rumored in trade talks for months, including in deals to the Houston Rockets and Cavaliers.
The Knicks paused trade talks last week, as it appeared a deal with the Rockets was getting close. Sources told the New York Daily News that Anthony now has "no interest" in returning to the Knicks next season.
League sources told ESPN last week that Anthony expects the Knicks to trade him to the Rockets. Anthony signed a five-year, $124 million contract in 2014 with the Knicks, but is willing to waive his no-trade clause to join a contender.
Earlier this week, Portland Trail Blazers star C.J. McCollum attempted to recruit Anthony by posting an edited picture of the Knicks forward wearing a blazers jersey. McCollum and teammate Damian Lillard have both reached out to Anthony to try and get him to join the Blazers, according to the Oregonian.
Sources told ESPN that the Rockets are prepared for negotiations with the Knicks to possibly run through the start of training camp.