Gina Miller
- Born
- 19 April 1965 (61 years)
- Place of birth
- Georgetown, British Guiana [now Guyana]
- Gender
- Female
Gina Nadira Miller is a Guyanese-British business owner and activist who initiated the 2016 R v Secretary of State for Exiting the European Union court case against the British government over its authority to implement Brexit without approval from Parliament.