The UK Fiancé Visa, also known as the "prospective marriage visa," allows individuals to enter the UK to marry their British or settled partner. To apply, the sponsoring partner must be a British citizen or settled in the UK. Applicants must prove a genuine relationship, intend to marry within six months, and meet financial and accommodation requirements. Adequate English language skills are also essential. The application is submitted online, and the process involves providing supporting documents and attending a biometric appointment. Consult the official UK government website for the latest requirements.