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The microstructural evolution in a Mg-2.0%Zn-0.8%Gd (wt.%) alloy during hot rolling was investigated. {1 0 (1) over bar 2} twinning and shear bands were found after the rough-rolling process, while only shear bands were found after the finish-rolling process. The shear bands were observed mainly in grains with their c-axis parallel to the normal direction of the rolling sheets and were suggested to have been originated by low-angle boundaries. Continuous dynamic recrystallization occurred around the shear bands as well as within the dynamic recrystallized grains inside the shear bands. Crown Copyright (C) 2010 Published by Elsevier Ltd. on behalf of Acta Materialia Inc. All rights reserved.