The Julia-Kocienski (J-K) olefination is a modified version of Julia-Lythgoe olefination. In this reaction, an aldehyde or ketone is coupled with heterocycle-bearing sulfone in the presence of a strong base to yield alkene. It has shown wide application in the synthesis of olefinic fragments in natural product synthesis. The Julia-Kocienski olefination is one of the most efficient protocols for the synthesis of E-alkenes. Nowa-days, a variety of natural products were synthesised by using the Julia-Kocienski olefination as the key step, and several developments and modifications were witnessed in this area. This review comprehends the recent developments and achievements in Julia-Kocienski olefination along with its application in natural product synthesis covering literature from 2016 to 2021.