While the cast list for "Mystic Christmas" has not been released by Hallmark, Chris Regan shared some details about the movie's production with WTNH News 8. Regan's family owns Olde Mistick Village, the 18th-century style shopping mall in Mystic, Connecticut, where the holiday movie is being filmed.

"I know there's somebody who is in this movie that was in the 'Mystic Pizza' movie," Regan told the news outlet. This won't be the first time that a "Mystic Pizza" actor returned to the location, though. Conchata Ferrell, who played the owner of the pizza parlor in the original film, did return to Mystic to appear in the Lifetime movie "A Very Nutty Christmas." However, Ferrell passed away in 2020.

While Regan didn't elaborate on the cast connection any further, he did mention that actual Mystic businesses and attractions would be featured in the Hallmark flick. For example, both Mango's Wood-Fired Pizza Co. and Mystic Aquarium will appear in the film, with the aquarium said to be an integral part of the plot.