The Russian-Ukrainian relationship is inherently complex. Since the end of the Cold War, there have been several defining moments in this relationship, which have contributed to how Russia perceives any potential challenges to its security. Securitising discourse from Russian political leadership, namely the President, offers an insight into what aspects of this relationship are escalated so extensively that extreme courses of action may be deemed necessary (i.e., a full-scale invasion of Ukraine). Drawing on Buzan et al. (1998), this project identifies the key sectors that Russia politicises, and those that it securitises vis-à-vis Ukraine. In addition, this study highlights the key sub-themes within politicisation and securitisation that were found within these sectors. This is all within a timeframe where relations have moved from comparatively stable to a time of war (February 2019 – February 2023). There is some degree of overlap between the themes politicised and securitised, especially across the military, political, societal, and economic sectors of security. There were no cases of securitisation within the environmental sector. Overall, this study found a significant shift in Russia’s securitisation framing of Ukraine from mid-2021 onwards.