Principal John Weller is the principal of Haley and Alex Dunphy's High School who is heard in "Phil on Wire".

Her secretary, Rose, asks Claire via phone if she can hold for him and she says yes, though she can't talk because she has to park her car and she is in the loading and unloading zone. John tells her that Mr. Waters caught Alex letting Haley copy her homework and that he is about to have a little talk with them, so they'll be out a few minutes late. Claire apologizes to John saying that she is a better mother than this, and John tells her that she has said that already.

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