It's sweeping the nation," jokes the actor, who reflected on the 1989 rom-com in an interview with PEOPLEBilly Crystal says there’s a moment from When Harry Met Sally that fans have been quoting back to him lately — and no,

To further commemorate the film, Hellmann’s teamed up with Katz’s Deli. Through Sunday, February 9, they are offering a "What She’s Having’ Sandwich" Package which includes recipes, Hellmann’s mayonnaise Katz’s turkey and their famous hand-carved pastrami with fresh rye bread. Visit katzsdelicatessen.com for more details.

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.