The Korean Wave is increasingly growing over the years, which makes K-Pop and K-Pop idol getting more attention. This leads to many companies which are having them as their celebrity endorser. Does having K-Pop idol specifically Jungwoo NCT will increase the purchase intention? This research propose that this effect is mediated by customer engagement. We propose that when K-Pop idol fans are interested in their idol and viewing their idol in an advertisement, they will engage more with the brand and the idol through social media. This engagement will then increase their purchase intention. The data were analyzed using PROCESS macro. The results showed a full mediation effect of customer engagement. After the analysis, this research offers theoretical and practical implication for companies. This research suggests for brands that used celebrity endorsement to facilitate customer engagement. Some of the ways are, brands could hold a fan meeting, a fan sign or private events that will increase the interactions with celebrity’s fans.