There is a growing acceptance in international development circles of the contribution a revitalised planning can make to addressing key urban challenges. Current expectations that planning can play roles in managing the growth of cities in ways that promote their sustainability, inclusiveness and liveability, contrasts with past perceptions of planning as an irrelevant discipline obsessed with spatial ordering and control. This paper considers whether the new forms of planning can address the challenges facing cities, with particular reference to the South African context. It does so through providing an overview of the shift in thinking about planning, and reflecting on the new agendas for planning as well as on some of their silences. It argues that the new approaches need to be understood in terms of contemporary urban and planning theories which are rethinking the nature of planning and its relationship to power and institutions, and which view cities as complex, dynamic places, embodying multiple interests and spatialities. These perspectives can help to enrich our understanding of the new approaches to planning, and to avoid ineffectiveness or a return to the negative elements of modernist planning of the past. The paper demonstrates the argument through focusing on some of the recent themes that have received attention in the contemporary international agendas for planning: the cross-cutting themes of sustainability and gender; the infrastructural turn in planning; and the ambiguities of the compact city. While these are quite particular concerns, they highlight the complexities of institutionalising the new approaches to planning, and ways of thinking about spatial planning.