Abstract PurposeofReview Inthesettingofrotatorykneeinstabilityfollowinganteriorcruciateligament(ACL)reconstruction,therehas beenaresurgenceofinterestinknee’santerolateralcomplex(ALC).ReconstructionoraugmentationoftheALCwithprocedures such as a lateral extra-articular tenodesis (LET) has been proposed to reduce rotatory knee instability in conjunction with ACL reconstruction. The current review investigates the recent literature surrounding the role of the ALC in preventing rotatory knee instability.