James and Antetokounmpo were the leading vote-getters from each conference, making them the players who will choose who plays on which team for the Feb. 17 matchup at Charlotte.
Reserves will be announced Jan. 31. From there, James and Antetokounmpo will choose the rest of their 12-man rosters, with conference affiliations irrelevant.
All-Star starters are chosen by a combination of voting from fans, media and NBA players. Among the notable snubs based on fan voting: Dallas rookie Luka Doncic, who was second in the West frontcourt voting; Minnesota's Derrick Rose, who outpolled Harden for the No. 2 spot in the West guard voting; and Miami guard Dwyane Wade, who fans voted second among East guards in his 16th and final NBA season.