…“I don’t know how the idea of a hologram came to mind, but a lot of us know that this technology exists,” he said. He searched online for a company with studios in both Toronto and London, landing on ARHT Media, which beamed Ms. Redington to Toronto in the form of a hologram, both to deliver a toast, which she had prerecorded, and then to have a live chat with Ms. Smith. Ms. Redington appeared in her bridesmaid dress, with her hair and makeup professionally done. They also had a virtual hug. To make this happen, Ms. Redington stood in front of a green screen in a London studio, in the middle of the night.