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.

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.

Billy Crystal and Meg Ryan will recreate a famous scene from 1989's 'When Harry Met Sally' for a Hellmann's Super Bowl commercial

Fans were right-Meg Ryan and Billy Crystal are officially reuniting! The beloved When Harry Met Sally duo sparked excitement when Ryan shared a nostalgic photo with Crystal on Instagram on January 22.

Meg Ryan and Billy Crystal recreated a classic scene from "When Harry Met Sally" for a new Super Bowl ad, with a special appearance by Sydney Sweeney.

The stars of the 1989 romantic comedy made their return to the legendary Katz's Deli in New York City to star in an epic ad for Hellman's mayonnaise, the brand released today on YouTube. Sitting across from each other at a deli table, the stars replicate the set-up for what is now the iconic "I'll have what she's having" scene.

The ad, created by the ad firm Edelman, is a redux of the famous fake orgasm scene, in which Sally Albright (Meg Ryan) attempts to prove to Harry Burns (Billy Crystal) that women can very convincingly fake orgasms.

When I opened my Instagram feed and saw a picture of Meg Ryan and Billy Crystal together again, my first reaction was "AH!" — especially since they're sitting on a couch, just like they do at the end of When Harry Met Sally.