who is the costume designer for beaulah om dutton ranch

The costume designer appears to be Fiona , based on a behind-the-scenes post that says, “This is Fiona, our incredible costume designer.”

For context, Janie Bryant is also associated with the wider Dutton Ranch / Yellowstone -adjacent styling conversation, but the specific post tied to Beulah Jackson’s look names Fiona as the costume designer.

Quick read

• Beulah Jackson is played by Annette Bening.

• The post you’re asking about points to Fiona as the costume designer.

• Fan fashion pages are already tracking Beulah’s outfits, which suggests her wardrobe is getting attention online.

Bottom note

That said, public credits for the series may still be the best source for a final confirmed listing, and the online conversation right now is mixing character styling, wardrobe features, and broader Dutton Ranch production chatter.