Hundreds of Muslims thronged the famous Dargah at Mount Road in Chennai and also visited the Muslims-dominated Nagore in Nagapattinam district of Tamil Nadu to offer special prayers.
Soon after the namaz was over at the mosques, people hugged each other and wished "Eid Mubarak.
Different varieties of biryani marked the day while some also offered food to poor and needy outside the mosques.
Tamil Nadu Governor K Rosaiah, Chief Minister J Jayalalithaa, DMK President M Karunanidhi and several political party leaders greeted the people on the occasion of Eid-ul-Fitr.
Muslims in Kerala had celebrated Eid-ul-Fitr yesterday.