Josh Barnett will face Frank Mir after an absence of 11 years from the Octagon.
The former heavyweight champion will face Mir at UFC 164 on August 31 in Milwaukee, promotion officials have said.
This announcement comes after Barnett signed a multi-fight deal with UFC last week.
Barnett has fought professionally since 1997 and made his UFC debut in 2000 beating Gan McGee at UFC 28.
In March 2002 Barnett had captured the UFC heavyweight champion after defeating Randy Couture with a second-round technical knock-out.
However, the 35-year old was shortly tested positive for banned substance and was stripped of the belt. He hasn't contested under the UFC banner since, until now.
He has spent time fighting in Japan, where in 2006 he progressed to the finals of the PRIDE open weight grand prix before losing to Mirko Filipovic.
Barnett has recently fought for the likes of Pancrase, Pride and Strikeforce and is nicknamed the 'Warmaster.'
He has won nine of the last ten fights having last competed in January when he overcame Austrian Nandor Guelmino.
Frank Mir is currently on a two-fight losing streak after consecutive losses to Junior Dos Santos and, more recently, to Daniel Cormier last month.
Mir's most recent victory came in December 2011 when he beat Antonio Rodrigo Nogueira.
After breaking Nogueira's arm during the fight, Mir was awarded the 'Submission of the Year' at the 2012 Fighters Only World MMA Awards.
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