The article presents a direct experimental demonstration of Floquet engineering in monolayer graphene using time-resolved momentum microscopy. The authors use linearly polarized infrared driving light fields to coherently dress the graphene and then probe the energy-momentum dispersion of the light-dressed band structure with extreme ultraviolet (EUV) laser pulses. By comparing the measured and calculated ARPES maps, they identify energy- and momentum-resolved fingerprints of Floquet sidebands, Volkov sidebands, and their quantum path interference. Specifically, they show that the quantum path interference between Floquet and Volkov states is a powerful tool to unambiguously identify light-dressed band structures. The results provide strong evidence for the successful generation of Floquet states in graphene, paving the way for experimental realization of theoretical proposals on Floquet-engineered band structures and topological phases in quantum materials.The article presents a direct experimental demonstration of Floquet engineering in monolayer graphene using time-resolved momentum microscopy. The authors use linearly polarized infrared driving light fields to coherently dress the graphene and then probe the energy-momentum dispersion of the light-dressed band structure with extreme ultraviolet (EUV) laser pulses. By comparing the measured and calculated ARPES maps, they identify energy- and momentum-resolved fingerprints of Floquet sidebands, Volkov sidebands, and their quantum path interference. Specifically, they show that the quantum path interference between Floquet and Volkov states is a powerful tool to unambiguously identify light-dressed band structures. The results provide strong evidence for the successful generation of Floquet states in graphene, paving the way for experimental realization of theoretical proposals on Floquet-engineered band structures and topological phases in quantum materials.