Prosthetics are widely used to help people with permanent disabilities and provide a new chance to lead a normal and independent life. Prosthetics are customized for each individual, keeping in mind the use and physical attributes. However, the conventional prosthetics are heavier and the production is expensive and time consuming. The present study addresses this problem and proposes an alternative design for prosthetic foot and calf. The weight of the prosthetics is minimized with a hybrid optimisation approach using generative design and topology optimization. The proposed design has a compliant mechanism to minimize the load and it provides ease to the wearer. The designed prosthetic was simulated while walking to analyse the stress distribution. The study concludes that the wearer will feel comfortable with the new design, and will be able to walk naturally.