Smbat VIII Bagratuni or Smbat the Confessor (Armenian: Սմբատ Խոստովանող, romanized: Smbat Khostovanogh) was an Armenian noble of the Bagratid (Bagratuni) family and one of the most important princes (nakharar) of Armenia in the mid-9th century as the commander-in-chief (sparapet) of Armenia. Taken prisoner to Samarra, he was pressured to convert to Islam but refused and died there. He was the father of Ashot I of Armenia, founder of the Bagratid Kingdom of Armenia.