A significant proportion of Australian children exceed the World Health Organization’s recommended dietary intake of free sugar, particularly through consumption of sugar sweetened beverages. Front-of-pack nutrition labels have been shown to increase perceived risk and deter consumption of sugar sweetened beverages. However, when it comes to young children, past studies in this area have focussed almost exclusively on a parent’s choice of beverage for children. This study investigated the influence of four different label designs (text-based health warning, tooth decay pictorial, teaspoons of sugar, Health Star Rating) on the beverage choices of N = 1,229 Australian children (aged 4-11 years) and their parents. In an online vending machine scenario, parent-child dyads were separately asked to select which beverage they would choose for themselves before and after being randomised to one label condition. Beverages displayed included 100% fruit juice, soft drink, artificially flavoured soft drink, flavoured milk, plain milk and bottled water. Healthiness of beverage choice was determined by a 1 – 10 ranking based on review by a panel of experts (10 dietitians and nutritionists). ANOVAs assessed whether labels led to a significant change (p < 0.05) in healthiness of beverage choice. While most participants did not change their choice of beverage following exposure to a label, 15.3% of parents and 17.9% of children chose a healthier option following label exposure. For parents, all label designs performed comparably; however, for children, small but significant differences between label designs revealed that the teaspoons of sugar label, the text-based label, and the tooth decay pictorial label were all more impactful in promoting healthier drink choices compared to the Health Star Rating. These findings can inform public health advocacy efforts to improve food labelling in Australia and could be incorporated into educational resources to help children understand nutritional profiles of different sugary drinks.