Charlotte Campbell lost Olivia, who was just 15, at the attack at the Ariana Grande concert in May, which claimed the lives of 23 people, many of whom were young concert-goers.
She is marrying her fiancée Paul Hodgson, and their big day comes just a few days before tragic Olivia will have turned 16, with every detail of the wedding being inspired by Olivia.
The bridesmaids will wear her favourite colour of blue, and have been chosen based on who Olivia would have preferred, as will the outfits of both bride and groom.
Paul told ITV: “Even though it’s our day, everything has been based around Olivia’s life and dreams, her hopes and wishes.”
Charlotte added: “All we can keep thinking is, we are fulfilling her dream for us.”