In 2017 Mellors co-represented Finland at the 57th Venice Biennale. He has previously participated in the Taipei Biennial in 2014 and Performa 2011 in New York. Mellors has exhibited at institutions in Europe and the United States, including the Hammer Museum, Los Angeles, in 2014 and the ICA, London, in 2011. He was the recipient of the prestigious COBRA award in 2011.