From Longman Dictionary of Contemporary Englishsomebody/something happens to be somethingsomebody/something happens to be somethingBEused when telling someone something in an angry way This happens to be my house! → happen
Examples from the Corpus
somebody/something happens to be something• Well he happens to be an old flame of Mummy's.• It will move into any refuge that happens to be conveniently available.• Start with any old folder that happens to be on your desktop.• This junk pile just happens to be our epic.• Any animal species that happens to be superficially dull will be ignored, perhaps even maltreated.• Incidentally this also happens to be the most difficult part of the instrument's compass from the point of view of fingering.• Ewing now happens to be the president of the players union. 