Latin for the Queen, in whose name public criminal prosecutions are usually brought. Usually abbreviated to R or Reg in case citations. When appearing as the respondent to a criminal appeal, may be written out in full as The Queen. As a party, referred to as The Crown.

Claims for judicial review in the civil courts are also brought in the name of the Crown, “on the application of” the claimant. (Formerly, they were brought as applications for prerogative remedies, such as mandamus and certiorari, “ex parte” the applicant.)