Heidi, Spencer and co filmed inside a retail store in Los Angeles, California.
Stephanie, who recently starred another reality television show called Made in Chelsea in the U.K., also showed up for the filming.
It appeared to be a fun day had by all, especially with Gunner around to put a smile on everyone's faces.
Spencer also enjoyed a nice drink while perusing around the shopping location.
The Hills: New Beginnings will include a ton of returning cast members who appeared on the original series The Hills but will also have some new editions, notably actress Mischa Barton.
Other OG cast members not returning include Lauren Conrad, Kristin Cavallari and Lo Bosworth. The Hills: New Beginnings is slated to premiere sometime in 2019.
Are you excited to watch The Hills: New Beginnings? Sound off in the comments.