Both UFC heavyweight champion Stipe Miocic and light heavyweight champion Daniel Cormier have embarked on their head coaching roles for The Ultimate Fighter’s 27th season.

The two are in Las Vegas working with a cast of unbeaten lightweights and featherweights who are seeking to join the ranks of the UFC.

Miocic’s coaching staff includes himself, Chris Camozzi, Dustin Jacoby, James Krause and Marcus Marinelli, Camozzi revealed on social media.

Cormier, meanwhile, makes his third appearance on the reality series after previously helping both Cain Velasquez and Josh Koscheck. “DC” is joined by Velasquez, Bob Cook, Javier Mendez, Leandro Vieira and Deron Winn.

The Ultimate Fighter 27 premiers on FOX Sports 1 on April 18 and concludes July 6 with The Ultimate Fighter 27 Finale. One night later at UFC 226, Miocic puts his heavyweight title on the line in a true champion vs. champion match against Cormier.

Below is the roster for TUF:

Lightweight

Thailand Clark (7-0), 28, Fort Worth, Texas

Joe Giannetti (6-0), 22, Norwell, Mass.

John Gunther (6-0), 32, Cleveland, Ohio

Jose Martinez Jr. (4-0), 27, Lorain, Ohio

Luis Pena (4-0), 24, Hillsboro, Miss. by way of Naples, Italy

Richie Smullen (3-0-1), 26, Arklow, Ireland

Mike Trizano (6-0), 25, Ramsey, N.J.

Allan Zuniga (13-0), 25, San Miguel, Costa Rica

Featherweight

Jay Cucciniello (8-0), 31, Malaga, Spain by way of Dublin, Ireland

Tyler Diamond (9-0), 26, Oroville, Calif.

Brad Katona (6-0), 25, Dublin, Ireland by way of Winnipeg, Canada

Bryce Mitchell (9-0), 23, Cabot, Ark.

Suman Mokhtarian (8-0), 25, Sydney, Australia

Dulani Perry (4-0), 31, Houston, Texas

Kyler Phillips (5-0), 22, Surprise, Ariz.

Ricky Steele (5-0), 29, Boise, Ida.