Who Is First in Line for the British Throne: Current Order of Succession

The person first in line to the British throne is the monarch’s eldest son. As of now, that is Prince William, the eldest son of King Charles III. After him, the succession follows a mix of proximity of kin and the rules codified in law, including requirements for the sovereign to be in communion with the Church of England and to reside in the United Kingdom. This explainer sets out the current line of succession, the principles that determine it, and the roles and backgrounds of those most likely to ascend.

How Line of Succession Is Determined in the United Kingdom

Succession to the British throne is governed by statute, common law, and long-standing constitutional convention. The core rules evolved through legislation, most notably the Act of Settlement 1701, the Succession to the Crown Act 2013, and other related reforms. These laws establish who may become monarch, how priority is assigned, and what obligations the monarch must meet.

Key Rules That Shape the Line

• Heredity based on legitimate descent and birth order.
• Protestant faith requirement under the Act of Settlement; the sovereign must be in communion with the Church of England.
• Limit on the monarch’s residence abroad and expectations to reside in the United Kingdom.
• Marriage to a Roman Catholic no longer disqualifies a person, but marrying a Catholic influences the succession order for descendants.

Current Line of Succession to the British Throne

Below is the verified, relationship-based line of succession as shaped by recent births, marriages, and the laws in force. The list focuses on the first several people who would typically be considered in line, reflecting both their proximity to the monarch and their legitimacy under established rules. The order may shift over time due to births, marriages, and new laws.

The table above reflects the status as informed by public registries, palace announcements, and the fixed provisions of the Succession to the Crown Act 2013, which removed male-preference primogeniture for those born after 28 October 2011 and removed disqualification for marriage to a Roman Catholic (while preserving the sovereign’s Church of England requirement).

What It Means to Be First in Line

Being first in line to the throne carries constitutional weight but rarely immediate power. The heir is expected to prepare for future sovereign duties through public engagements, study of government operations, and support for national and Commonwealth roles. Under the Regency Acts, if the monarch is incapacitated or under age, a regent is appointed—often the next qualified person in line—who exercises most royal powers on behalf of the monarch.

Duties and Preparation of the Heir

• Undertaking royal tours and diplomatic visits to build experience.
• Receiving regular briefings on government policy and security matters.
• Supporting charities and causes that align with future national priorities.
• Maintaining constitutional neutrality in public political matters.

How Succession Rules Could Change Over Time

Succession is a matter of law, not private preference, and future changes require parliamentary agreement. Proposals to alter aspects of succession—such as removing the Church of England requirement, adjusting marriage-related restrictions, or modifying male-preference rules—would need to pass through Parliament and, where relevant, the legislatures of the 15 Commonwealth realms. Any such change would be implemented transparently and with broad cross-party and public consultation.

Other Factors That Influence Who Is in Line

Several practical and legal conditions affect whether someone remains in, or moves within, the line of succession. Marriages that do not meet royal approval historically triggered the Royal Marriages Act 1772, though this was repealed in 2015 for those in the first six in line. Faith, residency, and age influence eligibility under the Regency Acts and other statutes. Consent for marriages under the Royal Marriages Act’s successor rules remains a formal step for the first six successors.

Practical Conditions That Apply to Heirs

• Permission to marry from the first six in line is required under updated 2015 rules.
• The monarch is expected to be present in the United Kingdom for key constitutional moments.
• The heir must maintain political neutrality and avoid partisan activity.

Why Line of Succession Matters to the Public

The line of succession shapes the continuity of the Crown, informs constitutional stability, and provides a transparent framework for transitions of power. Clear rules reduce uncertainty in moments of illness, death, or abdication and reassure the public about the readiness of future monarchs. Understanding how priority is assigned helps explain why certain relatives appear before others and how modern reforms balance tradition with contemporary values.

Common Questions About Succession

• What if the first in line is under age? A regent appointed under the Regency Acts serves until the heir reaches 18.
• Can a person further down the line precede someone ahead? Only in specific, legally defined circumstances such as incapacity or under age; birth order remains the primary determinant.
• Does marriage to a Catholic affect current heirs? Marrying a Catholic no longer removes a person from the line, but the sovereign must still be in communion with the Church of England.

Status Clarification and Line Stability

Status in the line is determined by birth, lawful marriage, and ongoing compliance with eligibility rules. The Succession to the Crown Act 2013 and earlier reforms provide a stable basis that is not subject to frequent change. As a result, the person first in line today—Prince William—remains a reliable point of reference for public understanding of how the monarchy succession operates in the twenty-first century.