UFC 89: Bisping vs. Leben was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on October 18, 2008, at the National Indoor Arena in Birmingham, United Kingdom.

The event was headlined by a middleweight bout between Michael Bisping and Chris Leben.

[2] Leben admitted he had used the substance several months prior to the fight, but stated he had assumed it would have been out of his system by then.

This event aired live in Great Britain and Ireland on Setanta Sports and via tape delay in the United States and Canada on Spike TV.

This event marked the debut of longtime UFC fighter and record holder Jim Miller.