The record for the most appearances in international Test cricket is held by Sachin Tendulkar of India, who played a remarkable 664 matches from 1989 to 2013. Tendulkar's contributions to the sport are legendary, and he is widely regarded as one of the greatest cricketers of all time. His career includes holding numerous records, such as being the top run-scorer in Test matches and One Day Internationals (ODIs), further solidifying his legacy in cricket history.