Strong linkages exist between the ongoing discrimination and marginalisation of women and girls and the challenges faced by lesbian, gay, bisexual, transgender and intersex (LGBTI) people. Both result from the idea that there are only two sexes, biologically determined at birth, and that every person must behave according to that sex. This restricts people’s control over their lives and their bodies, in living their lives and fulfilling their potential. This hinders development and progress not only for the individual, but also for society as a whole. Development agendas such as the 2030 Agenda for Sustainable Development and the EU Gender Action Plan can have a much larger impact if sexual minorities are included in the discussion on gender justice, gender equality and equal opportunities.