Foodie bloggers Jasmine and Melissa Hemsley took a night off from creating healthy recipes to meet their York fans.
The duo, whose Hemsley + Hemsley blog is hugely popular, appeared for a Q&A at Waterstones on Coney Street.
Ebullient and chatty, Jasmine and Melissa charmed the sell-out audience.
Later they signed copies of their new book, Good + Simple, which looks set to follow their first volume The Art of Eating Well into the bestseller charts.
After taking selfies with their fans and the Waterstones staff the sisters headed to the station to catch a train home to London, ready for some more blogging and recipe-writing for Vogue magazine.