Hi Bonnie, I hope this link helps you
Hello. I would screen shot the cast - print up the photos - trim down the portraits and insert into clear glass balls. Alternatively they could be modge podged on paper mache rounds.
Go with Victorian style and period of WWI pieces.
Don't forget the pearls.
I'd do stands of pearls for garland, maybe do ornaments of tea cups, danishes, etc.
Look for Period decorations on Selling sites like Ebay and Amazon or Thrift stores etc. Or buy new and decorate yourself to match what you are looking for. Traditional English!!
Looks like huge tree, white lights, draped beads, and gold ornaments! https://www.pinterest.com/pin/327707310380358145/