The Prince Regent greeted Alvanley and Pierrepoint , but then `` cut '' Brummell and Mildmay by snubbing them , staring them in the face but not speaking to them . They were also the four hosts of the masquerade ball in July 1813 at which the Prince Regent greeted Alvanley and Pierrepoint , but then `` cut '' Brummell and Mildmay by snubbing them , staring them in the face but not speaking to them .