Chris Smith poses with a basketball at Knicks media day....

Chris Smith poses with a basketball at Knicks media day. (Sept. 30, 2013) Credit: Patrick E. McCarthy

GREENBURGH – The Knicks made it official, and announced the signing of Jeremy Tyler this morning. They waived Chris Smith to make room for Tyler.

The 6-foot-10 Tyler averaged 18 points and 10.2 rebounds in six games with the Knicks’ D-League team, the Erie BayHawks. The Knicks signed him over the summer and he likely would have made the team in training camp if he hadn’t broken his foot in September.

The Knicks waived Tyler on Oct. 25, keeping Cole Aldrich and Smith, who is J.R.’s younger brother.

Yesterday, J.R. Smith didn’t seem too happy about the news that his brother was going to be cut. Smith posted an instgram picture of Robert DeNiro and Sharon Stone from Casino with the words, “You know the sad thing about betrayal? It never comes from an enemy.”

The Knicks signed Chris Smith to a fully guaranteed one-year deal for $490,000. He appeared in two games, playing two minutes and not recording a single statistic.

J.R. Smith signed a three-year, $17.9 million in July. The third year is a player option.

Tyler, a former second-round pick of the Bobcats in 2011, gives the Knicks much-needed depth up front, where Tyson Chandler, Kenyon Martin and Amar’e Stoudemire all have missed time with injuries.

Tyler has appeared in 63 NBA games for the Warriors, averaging 3.6 points and 2.5 rebounds.