Buchanan, 22, has appeared in Owen's music videos "8 Second Ride" and "Barefoot Blue Jean Night."
People.com said the bride wore an Amsale gown and veil, while the 30-year-old groom donned a white linen Armani shirt and Tommy Bahama drawstring pants for the occasion. Both were barefoot for the family-only ceremony, which Owen's uncle Ron officiated on the beach.
Owen proposed to Buchanan during a show at his alma mater, Vero Beach High, last month.
Celebrity Families of 2014 [PHOTOS]