The photograph of Beyoncé, holding her baby bump with a veil over her head, broke records when it appeared on the star's Instagram page in February, picking up close to 6.6million likes in the first eight hours.
"We would like to share our love and happiness. We have been blessed two times over,' Beyoncé wrote alongside the photo.
"We are incredibly grateful that our family will be growing by two, and we thank you for your well wishes."
The East Village Cheese and Wine Festival takes place between 12pm and 6pm at the site of the former London 2012 Athletes' Village.
Among several cheese-related events will be a Cheese Carving Championship, in which Mr Bradley and two more specialist cheese sculptors will be going head-to-head "to create the most 'Brie-lliant' sculpture."