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Thank you. The braces came off and my head finally caught up with my ears.
—Matt telling D.J. why he looks so different in an old photo.
Matthew "Matt" Harmon is a guest character on Fuller House.

Matt is the son of D.J.'s retired boss Fred Harmon. He is a veterinarian, like his father and D.J., who lived in Miami, FL prior to Fuller House where he ran his own veterinary clinic. Along with D.J., he is the co-owner of Harmon-Fuller Pet Care, the newly renamed clinic his father owned before retiring. However, shortly after he proposes to D.J., she broke up with him in Japan.

He is portrayed by John Brotherton.


  • Matt is Steve Hale's rival as they both wish to date D.J.. However, in the Season 1 finale, D.J. tells them that she's not ready to date yet.
  • It is revealed that Matt has a dog in Love is in the Air.

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