No deal has been finalized, but the team has informed all other candidates of their decision. Hornacek was interviewed by Jackson earlier this week.
The former Suns coach was fired from that job this past February after his team lost 19 of 21 games, including 14 straight on the road. Hornacek was in his third season with the Suns, and had high hopes after posting records of 48-34 and 39-43 in his first two seasons. At the time of his firing, the team sat in 13th place in the Western Conference with a record of 14-35.
The Knicks fired former coach Derek Fisher in February, and had been looking at the likes of David Blatt, Frank Vogel, and Kurt Rambis as possible replacements. Horancek had also been looking around for another job, including interviewing for the Warriors' head assistant coach position that opened up when Luke Walton took the Lakers' head coaching job.
Hornacek's only other coaching experience was as an assistant with the Utah Jazz for three seasons. He played 15 seasons in the NBA with the Suns and Jazz. His next task, coaching Carmelo Anthony and the Knicks in The Big Apple.