Katie Tonkiss is a Senior Lecturer in Sociology and Policy at the School of Social Sciences and Humanities, Aston University. Her work is situated in the field of critical citizenship studies and explores the relationship between (non)citizenship and belonging. Through her research, Katie has explored topics including post-national citizenship, statelessness, migrant detention, and anti-border activism. Most recently her research has focused on the social construction of the family across borders, and she is currently writing a book investigating family unification and citizenship acquisition in the context of international surrogacy. Katie's research has been funded by the Economic and Social Research Council, the British Academy, and - most recently - the European Commission.