Featherweights Jose Aldo (14-1) and Cub Swanson (13-2) will square off at WEC 41 on June 7th in Sacramento, California.
Swanson confirmed the bout to MMAjunkie late last week.
A top featherweight contender, Aldo has won seven-straight fights, including a first-round TKO of Chris Mickle in March at WEC 39.
Swanson was in the 145-pound title mix before suffering a first-round submission to Jens Pulver in late-2007. He bounced back in 2008 with victories over Donnie Walker and Hiroyuki Takaya that put him back in title contention.