Muslim-Christian dialogue is one of the most common dialogues around the globe. Even though the interreligious dialogue is accepted in Muslim countries, the discussions in Nigeria and Pakistan are facing challenges. This paper, therefore, intends to examine the Nigerian and Pakistani perspectives on Muslim-Christian dialogue to analyse its legality or otherwise from the main sources of the two religions. This is qualitative research comprising the historical and contextual approach of the Qur’ān, Hadith, and the Bible as well as views of Islamic scholars and Christian clergies. The findings reveal that Islam and Christianity not only acknowledge dialogue between Muslims and Christians but encourage it among other religions for the establishment of peaceful coexistence and sustainable development of a community. This paper, therefore, recommends that Nigerian and Pakistani Muslim scholars should give extra energy to enlighten Muslims to understand that interreligious dialogue does not in any way mean to unify Islam with Christianity.