Tech billionaire turned party girl, 32, plans to sue her TV star ex-girlfriend after lurid sex and drug claims she says are false, court papers show

Tech investor and Scale AI co-founder Lucy Guo says she plans to sue her former girlfriend, British actress Wallis Day, for defamation in the UK. Court papers show Guo has asked a US court to let her seek Instagram records from Meta, which could help establish how widely a disputed post circulated and inform a claim for damages.

Guo says Day’s post made false allegations about their break-up, including claims involving sex, belongings, money and drugs; Guo specifically denied refusing emergency services access to her home. The filings say the pair began dating in July 2025 and split in February 2026. Guo is seeking data on when the Instagram story was posted and removed, its audience and engagement, and the women’s follower counts; Meta says it handles account-record requests under its terms and applicable law.