Condit, 33, recently returned to the octagon after a 16-month layoff, losing by decision to Neil Magny at UFC 219 in December.
Meanwhile, Brown, 37, was thought to be retired after a thrilling TKO win over Diego Sanchez at UFC Fight Night 120 in November.
Officially unretired as of now https://t.co/xDilMVuCsZ
— Matt Brown (@IamTheImmortal) January 26, 2018
— Damon Martin (@DamonMartin) January 24, 2018
UFC on FOX 29 is scheduled for April 14 at the Gila Arena in Glendale, Arizona. Current bouts include:
Dustin Poirier (22-5-0) vs. Justin Gaethje (18-1-0)
Arjan Bhullar (7-0-0) vs. Adam Wieczorek (9-1-0)
More bouts are expected to be announced.