On 16 February 2021, Prime Minister Ardern criticised the Australian Government's decision to remove dual New Zealand–Australian national and ISIS bride Suhayra Aden's Australian citizenship. Aden had migrated from New Zealand to Australia at the age of six and became an Australian citizen. In response, Australian Prime Minister Scott Morrison defended the decision to take away Aden's citizenship, saying legislation removing dual nationals of their Australian citizenship if they were engaged in terrorist activities. After a phone conversation, the two leaders agreed to work together to address what Ardern said was "quite a [hard] legal [problem]".