How Pregnant Mandy Moore's Real Life Is Imitating Her 'This Is Us' Character's in a Huge Way

While Rebecca Pearson — Moore's character on the long-running NBC drama — had a different Big Three (she and husband Jack Pearson, portrayed by Milo Ventimiglia, shared twins and an adopted son), the "I Wanna Be With You" singer is gearing up for a family of five of her own.