“Billy Crystal-core” is dominating the internet as fashionistas aim to emulate the cozy style of the rom-com star in the 1989 Nora Ephron smash, “ When Harry Met Sally .” In that film, the funnyman, now aged 76, plays a political consultant who famously rocks a chunky white fisherman knit sweater.

The two actors revisit an iconic scene from their legendary romantic comedy in the commercial, a nostalgia play titled “When Sally Met Hellmann’s” (watch below). Ryan and Crystal play friends whose connection turns romantic in the 1989 movie written by Nora Ephron and directed by Rob Reiner.

It’s a reunion 35 years in the making, thanks to mayonnaise. More than three decades after the romantic comedy “When Harry Met Sally” first hit theaters, Billy Crystal and Meg Ryan are finally back together.