This one was a little harder to spot as Jill Morrison plays a nameless guest at the wedding an older Jamie attends. Although Morrison has had roles on Motherland: Fort Salem and in To All the Boys: P.S. I Still Love You, you'll probably also recognise her as the girl that "doesn't even go here" in Mean Girls. To be honest, the Bly Manor residents probably needed a cake made out of rainbows and smiles.