Mohammad Reza Aref is an Iranian engineer, academic and reformist politician who was the parliamentary leader of reformists' Hope fraction in the Iranian Parliament, representing Tehran, Rey, Shemiranat and Eslamshahr. Aref has also been heading the Reformists' Supreme Council for Policymaking since its establishment in 2015. He is currently member of the Expediency Discernment Council.

The Reformists are a political faction in Iran. Iran's "reform era" is sometimes said to have lasted from 1997 to 2005—the length of President Mohammad Khatami's two terms in office. The Council for Coordinating the Reforms Front is the main umbrella organization and coalition within the movement; however, there are reformist groups not aligned with the council, such as the Reformists Front.