The Japanese Voice Actors of Haruhi Fujioka and Hikaru Hitachiin are married in real life.
Vic Mignogna and Caitlin Glass both spearheaded getting Ouran to the United States for dubbing, after they both saw it in Japanese. Mignogna specifically wanted to play Tamaki Suou after falling in love with the character. Maintaining professionalism Glass still auditioned others for the role along with Mignogna. Vic's audition landed him the role in the end.
Both Todd Haberkorn (Hikaru) and Vic Mignogna (Tamaki) starred in the English dub of 'Soul Eater' (2008), as Death the Kid and Death Scythe, respectively.