Archbishop Nikitas (Lulias) of Thyateira and Great Britain is the Greek Orthodox Archbishop of Great Britain under the Ecumenical Patriarchate of Constantinople, elected by the Sacred and Holy Synod of the Ecumenical Patriarchate on 12 June 2019.

Before his election as archbishop, he was the metropolitan bishop of the Dardanelles and director of the Patriarch Athenagoras Orthodox Institute in Berkeley, California. Prior to this, he served as the first metropolitan bishop of the Greek Orthodox Metropolitanate of Hong Kong and Southeast Asia.