It's sweeping the nation," jokes the actor, who reflected on the 1989 rom-com in an interview with PEOPLE Billy 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.

Billy Crystal and Meg Ryan star in a brand-new Super Bowl advertisement that calls back to their iconic deli scene in "When Harry Met Sally."