Who is currently third in line to the British throne?

The third in line to the British throne is Prince George. He is the eldest child of the Duke and Duchess of Cambridge, and under current succession laws, as the first-born son of the future King, he takes precedence over his younger siblings. Following Prince George, Princess Charlotte is fourth in line, due to the changes brought about by the Succession to the Crown Act 2013, which allowed for birth order to take precedence regardless of gender. Therefore, the correct answer is Prince George, as he fits the criteria for royal succession being the eldest of the next generation in line.