FePt nanoparticles inside ordered mesoporous silica SBA-15 were synthesized via incipient wetness impregnation and subsequent thermal treatments in reductive atmosphere. The porous matrix is used to prevent sintering and agglomeration during the fcc-FePt to fct-FePt phase transition. According to magnetic measurements and Mossbauer spectroscopic studies, the resulting FePt@SBA-15 composites are ferromagnetic.