Gina Miller is reportedly afraid to leave her home after receiving threats of acid attacks.
In an interview with Verdict magazine, the 52-year-old said her life had completely changed in the wake of her appeal to the High Court over Article 50.
The businesswoman brought a successful challenge to the High Court and Supreme Court against the Government's right to trigger Article 50 and begin Brexit negotiations.
Her action ensured Theresa May needed to put a bill through Parliament to legally allow her to begin the withdrawal process - and made Miller a target of abuse from Brexiteers.
The 52-year-old revealed she'd been getting threats of acid attacks, which have made her afraid to leave her home - where she has installed 24-hour security.
Miller said she would even consider leaving the UK if the threats became too much to deal with.
Acid attacks have become a topic of national concern after a recent spate of incidents in London and across the country.