Place noodles into a heat-proof bowl. Cover with hot water. Stand until tender. Drain. Rinse under cold water.
Combine lime juice, fish sauce and sugar in a jug. Whisk with a fork to combine.
Heat a wok over high heat. Add oil. Swirl to coat. Add chicken. Stir-fry for 2 minutes until golden. Add prawns, onions and chillies. Stir-fry for 2 to 3 minutes or until prawns turn pink. Add noodles. Stir-fry for 2 minutes.
Add lime juice mixture to wok. Toss to combine. Slowly pour eggs over noodles. Stir-fry for 1 minute. Add sprouts. Toss well.
Spoon pad Thai onto plates. Sprinkle with peanuts and coriander leaves. Serve with lime wedges.