The purpose of this study is to identify the recommended Phase 2 (combination) dose (RP2CD) of the amivantamab and cetrelimab combination therapy in participants with non-small cell lung cancer (NSCLC) in Phase 1 (combination dose selection); and to evaluate the antitumor effect of the combination at the selected RP2CD in participants with NSCLC characterized on the basis of epidermal growth factor receptor (EGFR) and Programmed-cell death Ligand (PD-L)1 status, in the Phase 2 (expansion).