The Juilliard School hit a sour note with a veteran piano teacher who says she was canned because of her age.

Julie A. Jordan, 63, had taught at the Lincoln Center school for 30 years when supervisors claimed they would not renew her yearly contract due to “restructuring,” she claims in a lawsuit.

In all, three instructors over 40 years old were let go, while two younger “less experienced” ones remained, Jordan claims in her Manhattan federal court filing against the school.

When Jordan questioned why she was not being brought back for the 2015-2016 school year, a supervisor allegedly shrugged and said, “fait accompli,” the teacher charges.

Jordan “was and is devastated with disbelief over her termination,” according to court papers, in which she asks to be reinstated to her job, along with back pay.

Juilliard declined to comment.