Participants will be randomized in a 1:1 ratio to either rilvegostomig plus chemotherapy or pembrolizumab plus chemotherapy arm.

A Phase III, Randomized, Double-blind, Multicenter, Global Study of Rilvegostomig or Pembrolizumab in Combination With Platinum-based Chemotherapy for the First-line Treatment of Patients With Metastatic Non-squamous Non-small Cell Lung Cancer Whose Tumors Express PD-L1 (ARTEMIDE-Lung03)

A Phase III, Randomized, Double-blind, Multicenter, Global Study of Rilvegostomig or Pembrolizumab in Combination With Platinum-based Chemotherapy for the First-line Treatment of Patients With Metastatic Squamous Non-small Cell Lung Cancer Whose Tumors Express PD-L1 (ARTEMIDE-Lung02)