YOU’VE seen them on “Frasier” – now hear them with the Phil.

David Hyde Pierce and Harriet Harris, best known as Dr. Niles Crane and Frasier’s bloodthirsty agent, Bebe, will make their New York Philharmonic debuts in Berlioz’s opera “Beatrice et Benedict,” based on Shakespeare’s “Much Ado About Nothing.”

No, they won’t be singing, but – along with actor Philip Bosco – they will do the speaking parts (in English) that connect Berlioz’s arias and ensembles.

Performances are April 9, 10 and 12 at Avery Fisher Hall.