Robert Adrian Catley (born 11 September 1947) is an English singer. He is the lead singer of the hard rock band Magnum, sings for Avantasia, Hard Rain, and is also active as a solo artist.

He has also collaborated multiple times with Gary Hughes, the lead singer and songwriter for fellow British melodic rock band TEN, who wrote some of Catley's solo albums. Catley was born in Aldershot but raised in Birmingham, England. He attended Central Grammar School for Boys (Birmingham) and began an apprenticeship at the GPO before pursuing music after meeting like-minded musicians at college.