An enantioselectiveaza‐Friedel–Crafts reaction of indoles with γ‐hydroxy‐γ‐lactams using a chiralphosphoricacid catalyst is reported. The approach described herein provides an efficient access to 5‐indolylpyrrolidinones in good to quantitative yields and excellent enantioselectivities (up to >99% ee). The results suggest that the reaction may proceed via N‐acyliminium intermediates associated with