<p>Conventional polymeric composites have created a ruckus in the environment due to non-biodegradability and pollution. In pursuit of developing a novel green material for structural applications, this study fabricates and explores the properties of two biocomposites - one with banana fiber (BF) and the other with betel nut shell fiber (BNSF), both reinforced with polylactic acid (PLA). The effect of BNSF hybridization on the mechanical, thermal, water resistant and biodegradable properties of BF/PLA composite are studied. The hybridization improves the tensile strength of the composite significantly, the highest of all measuring 38.29&#xa0;MPa for BF/PLA with 30 wt% BF and 51.58&#xa0;MPa for hybrid BF/BNSF/PLA with 30 wt% BF and 5 wt% BNSF. The flexural and impact properties of the hybrid composites are also found to be comparatively superior to BF/PLA composite. The thermo-gravimetric analysis shows that both the composites are thermally stable up to 300 ^ͦ C. The water resistance also improves after hybridization. The soil burial tests show a maximum decomposition of 81.47% after 28 days, highlighting high biodegradability of the composites. This showed that the effect of hybridizing the PLA with BF and BNSF fibres improve the mechanical and thermal properties without compromising the biodegradability of the composites. The overall performance of the hybrid composite makes it suitable for use in structural applications like automotive parts, and other moderate load scenarios.</p>