Stella McCartney x Phia co-founders For Limited-Edition Collaboration - 22 Stella McCartney x Phia co-founders For Limited-Edition Collaboration - 24 Meadow Walker. Photo Credit: Bre Johnson / BFA 2023 │ Courtesy Stella McCartney PR. September 5, 2023 MFS Managing Editor Stella McCartney x Phia’s Sophia Kianni And Phoebe Gates Host Preview For Limited-Edition Collaboration