Sviatoslav "Svi" Mykhailiuk (Ukrainian: Святосла́в Михайлю́к, pronounced ; born June 10, 1997) is a Ukrainian professional basketball player for the Detroit Pistons of the National Basketball Association (NBA). He was selected with the 47th overall pick in the 2018 NBA draft by the Los Angeles Lakers.
Mykhailiuk played college basketball for the Kansas Jayhawks. Prior to playing at Kansas, he played for Cherkaski Mavpy in the Ukrainian Basketball SuperLeague from 2012 to 2014. He also played for the Ukrainian national team at the 2014 FIBA World Cup.