Iridessa (foaled 14 January 2016) is an Irish Thoroughbred racehorse. As a two-year-old in 2018 she was one of the best fillies of her generation in Europe, winning the Group 1 Fillies' Mile. In the following year she was beaten in her first three races but then recorded further major win in the Pretty Polly Stakes, Matron Stakes, and Breeders' Cup Filly & Mare Turf.