1. A rubber composition comprising at least rubber and reinforcement materials, the reinforcement materials comprising silica particles and Kraft lignin nanoparticles, wherein the phr ratio between the silica particles and Kraft lignin nanoparticles is ranging between 3 and 20; wherein the Kraft lignin nanoparticles have an average diameter size ranging between 10 and 100 nm as determined by scanning electron microscopy, and wherein the Kraft lignin nanoparticles have a glass transition temperature of at least 150° C. as determined by Differential Scanning Calorimetry.