Situated in Hong Kong’s post-colonial context of political crisis, this article attempts to investigate the unfolding of cultural activism during the Umbrella Movement occurred in 2014. This 79-day occupy protest, triggered by the government’s restriction on universal suffrage, has released protesters’ creative potentials in performing their struggles through a variety of aesthetic forms and practices. Questioning the traditional way of conceiving protest movement in terms of violent confrontations with government or instrumentalism, this article addresses the performative role of cultural activism which has been largely ignored in the study of Hong Kong protest movement. Rather, we argue that the creative practices enacted during the Umbrella Movement constitute in themselves the message that contains its own politics and grammars. These practices have constructed the meaning of the movement through naming, and have created the collective joy and identity among participants in the formation of movement solidarity. This article suggests that cultural activism is the spirit and soul of the Umbrella Movement, which has opened up a temporary yet crucial political space for democratic struggle.