The singer will represent the UK at the singing contest in May with his new song 'Love Will Set You Free'.
The track was recorded in London, Los Angeles and Nashville and was written and produced by Grammy Award-winning Martin Terefe and Adele collaborator Sacha Skarbek.
Humperdinck will be joined by guitarist James Bryan on the stage in Azerbaijan on May 26, when the Eurovision Song Contest 2012 will broadcast live to an estimated audience of 120 million people.
Choreographer Arlene Phillips will also be on hand to stage the performance in Baku.
Speaking about his participation, Humperdinck said: "I have my eyes on the prize with my song 'Love Will Set You Free'.
"I'm very proud of the song and with the nation behind me, I feel ready and look forward to the rollercoaster ride that is Eurovision!"
The Eurovision Song Contest grand final will air on BBC One and BBC One HD on May 26.
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Watch the music video for Engelbert Humperdinck's 'Love Will Set You Free' below: