Generative Artificial Intelligence (GenAI) is increasingly used for creative activities. Despite evidence of ‘creative outputs’ in existing writings, we lack detailed understanding of the ‘creative process’ whereby creativity emerges through GenAI-human interactions. In this research-in-progress paper, we take the case of scriptwriting as an ideal case for studying the creative process in the GenAI context and present an ongoing study involving 21 interviews with scriptwriters which we analysed using two rounds of qualitative coding. Our findings suggest that GenAI plays four different roles during the scriptwriting process: creative guide, proofreader and rewriter, content producer and creative collaborator. We contribute to the emerging literature on GenAI and human collaboration by explaining how the creative process is transformed in the GenAI era. Finally, we outline implications for scriptwriters and creative industries.