Mike Miller will be joining the Knicks' staff as an assistant coach for the 2019-20 season, the team announced on Monday.
SNY's Ian Begley reported on June 17 that barring an unforeseen change, Miller was expected to join David Fizdale's staff.
Miller was named G League coach of the year in 2017-18.
Assistant Howard Eisley left the Knicks recently to join Juwan Howard's staff at Michigan, creating an opening on the staff.
Since becoming Westchester's head coach in 2015, Miller has gone 108-92. In each of the past two years, Westchester lost in the conference semis.
Miller has run the same offense as the Knicks head coach while at Westchester, whether it was Derek Fisher, Jeff Hornacek or David Fizdale.
The Athletic first mentioned that Miller was a candidate for the opening created by Eisley's departure.
Miller joins a staff that includes Keith Smart, Kaleb Canales, Jud Buechler, Pat Sullivan and Royal Ivey. New York prides itself on the player development acumen on the coaching staff. Ivey was a key player development coach in Oklahoma City and remains so in New York.