Bourgas, Bulgaria - DREAM middleweight champion Gegard Mousasi will make his light heavyweight debut on May 25 at DREAM.9 vs. UFC and Affliction veteran Rameau Thierry Sokoudjou.

FiveOuncesofPain.com confirmed the news Friday afternoon with Mousasi?s manager, Apy Echteld.

Mousasi, 24-2-1, has not competed since winning the DREAM middleweight Grand Prix after defeating Ronald ?Jacare? Souza during the finals on Sept. 23, 2008.

Sokoudjou, 5-4, is currently on a two-fight losing streak that began at UFC 89 against Luiz Cane this past October following a second round TKO. He was defeated in his most recent fight against Renato ?Babalu? Sobral during Affliction and M-1?s ?Day of Reckoning? in January.