You know Amelia is so there for Felix (and Jim by proxy - yes, you get a pass for marrying Felix now). She'll even add some lively color to her wardrobe again for such a celebration! Only the best for one of her oldest friends. <3

Crowley might also make an appearance, but that depends on if Aziraphale is up for crowds with him. He does love parties and free food/booze... ;)