Gigi Hadid
As the sister of Hailey’s best friend Bella, we can expect that Gigi will attend the Baldwin/Bieber wedding. Gigi and Hailey have a close relationship with one another, aside from that of her sister Bella, shown at Gigi’s birthday celebration that Hailey attended. Rather than a question of whether or not she will attend the wedding, we can only wonder if she will walk down the aisle alongside her sister as a bridesmaid.