The Norwegian side provide the opposition at the Progress With Unity Stadium (20:00 BST kick-off), with excitement building ahead of the historic fixture.
Bizet Donnum joined Valerenga in 2017, and completed a domestic Double with them three years later, before spells with Paris Saint-Germain and Tottenham Hotspur, in advance of her switch to United in 2024.
In a wide-ranging interview with the matchday programme for the game, Celin said of her former side: "It’s a city club – loud fans, a lot of duels, a lot of power! Their style, when I was there, was good on the ball, technical players, creating things, and being proactive towards the goal.