
In the UK, the law prohibits certain blood relatives, step relatives, and relatives-in-law from getting married or entering into civil partnerships. The specific regulations have evolved over the years, with several amendments made in the first half of the 20th century. While marriage between cousins is permitted, marrying one's sister-in-law, defined as the sister of one's husband or wife, is prohibited by law. This article will explore the legal intricacies and implications surrounding the question, Can I marry my sister-in-law in the UK?
Can I marry my sister-in-law in the UK?
| Characteristics | Values |
|---|---|
| Marrying a sister-in-law | Prohibited |
| Marrying a cousin | Allowed |
| Residency requirements | Yes, in England and Wales |
| Marriage laws | Subject to the country of residence |
| Visa requirements | Applicable for non-UK residents |
| Documentation | Passport, address proof, and previous marriage documents |
| Step-relations | Allowed under certain circumstances |
| Adopted children | Cannot marry genetic parents and grandparents |
Explore related products
What You'll Learn
- Marriage between a man and his sister-in-law is prohibited in the UK
- Marriage laws in the UK also apply to those from outside the UK who want to marry there
- In the UK, marriage between cousins is permitted
- Step-relatives may marry in the UK, provided they are over 21 years old
- The UK prohibits certain blood relatives, step relatives, and relatives-in-law from marrying

Marriage between a man and his sister-in-law is prohibited in the UK
In the UK, a man is prohibited from marrying his sister-in-law. A sister-in-law is defined as the sister of a person's husband or wife, or the woman who is married to one of their siblings.
The UK prohibits certain blood relatives, step relatives, and relatives-in-law from getting married or entering into civil partnerships. This includes a man marrying his sister, mother, daughter, grandmother, granddaughter, aunt, niece, or half-sister.
Over the years, several acts have been passed to update the list of prohibited marriages. The 1907 Marriage Act removed a man's deceased wife's sister from the list of prohibited marriages. The 1921 Marriage Act allowed a man to marry his brother's widow, provided his brother was dead. The 1931 Marriage Act removed aunts-in-law and uncles-in-law from the list, provided the relevant aunt, uncle, niece, or nephew had died. The 1949 Marriage Act confirmed the previous three acts and specifically included half-blood relatives.
If you are visiting the UK and intend to marry there, you will be subject to the marriage laws of your home country. However, you will need to provide a document from your country confirming that there is no impediment to the marriage. If you are subject to immigration control, you will need to produce documentary evidence confirming that you are eligible to marry in the UK.
Hiring Mother-in-Law as Nanny: Good Idea?
You may want to see also
Explore related products

Marriage laws in the UK also apply to those from outside the UK who want to marry there
Marrying one's sister-in-law is illegal in the UK. A man is prohibited from marrying his late wife's sister, which falls under the category of prohibited marriages between in-laws.
Now, regarding your query about marriage laws in the UK for outsiders, here is some detailed information:
Marriage laws in the UK apply uniformly to both residents and individuals from outside the country who intend to get married in the UK. If you are visiting the UK to get married, you will need to follow the legal procedures and requirements outlined by UK law.
Firstly, it is important to understand the residency requirements. In England and Wales, you must give notice of your intention to marry at a register office where at least one of you has lived for seven days prior to giving notice. If you live outside the UK, the marriage cannot take place until you arrive in England or Wales and fulfil the necessary residence qualifications. There are no residency requirements in Northern Ireland or Scotland.
Secondly, you will need to provide certain documents to the registrar. These include evidence of your name, age, nationality (typically through a passport), and address. If either party has been married before, you must provide documents confirming your freedom to marry, such as a death certificate or decree absolute. If one partner is from outside the UK, they will also have to submit evidence of their immigration status.
Thirdly, it is crucial to be aware of the visa requirements. If you or your partner are from outside the UK, you may need a specific visa to get married in the UK, depending on your circumstances and where you intend to live after the marriage. You must apply for this visa unless you are already in the UK on a visa that lasts longer than six months.
Finally, there are some additional considerations for religious marriages. If you are getting married in the Church of England or the Church in Wales, you do not need to give notice to the Register Office. For other religious marriages, you will need to give 28 days' notice to the Register Office, and ministers or priests must be authorised with a certificate or licence from the local Superintendent Registrar.
In summary, while marriage laws in the UK do apply to those from outside the UK, there are specific additional requirements that must be met, including residency qualifications, documentation, and visa arrangements. It is important to ensure that you comply with all legal obligations to ensure that your marriage is legally recognised.
Fick's Law of Diffusion: Understanding Heat Transfer Dynamics
You may want to see also
Explore related products

In the UK, marriage between cousins is permitted
In the present day, there is a revival of cousin marriage in the UK, with certain diaspora communities having extremely high rates of first-cousin marriage, such as the British Pakistani community. This is a worrying trend as the children of first cousins are at a heightened risk of inheriting a serious disorder. According to Professor Alison Shaw, these children carry approximately double the risk of inheriting a serious disorder compared to the children of unrelated people.
In other countries, the laws regarding cousin marriage vary. In the US, several states prohibit cousin marriage, with 24 states banning first-cousin marriage, 18 states allowing it, and eight states permitting it only in certain circumstances. In China, cousin marriage was common during the Qing dynasty (1644-1912) but was banned in 1981 due to potential health concerns. In India, cousin marriage is acceptable and legal for Muslims but may be illegal for Hindus under the 1955 Hindu Marriage Act.
If you are intending to marry your cousin in the UK, there are certain legal requirements that must be met. If you are from outside the UK, you will need a visa and may need to produce a document from your country confirming that there is no impediment to the marriage. Additionally, you must give notice of your intention to marry at your local register office, and both parties must be at least 21 years old.
Contract Law and Sales: Enforceability and Limits
You may want to see also
Explore related products
$13.5 $18.99

Step-relatives may marry in the UK, provided they are over 21 years old
In the UK, a person's sister-in-law is the sister of their husband or wife, or the woman who is married to one of their siblings. The UK prohibits certain blood relatives, step relatives, and in-laws from getting married or entering civil partnerships. For example, a woman cannot marry her grandfather, uncle, or brother-in-law, and a man cannot marry his daughter, brother, or sister-in-law.
However, step-relatives may marry in the UK, provided they are over 21 years old and meet certain conditions. The younger member of the couple must not have lived under the same roof as the older person before the age of 18, and neither must have been treated as a child of the older person's family. These marriages can usually only take place during a civil ceremony, under licence.
If you are planning to marry in the UK, there are several legal requirements to consider. Both parties must give notice of their intention to marry in person at their local register office, and there may be residency requirements depending on where in the UK the marriage will take place. If either party is from outside the UK, they may need a visa, and documentary evidence may be required to confirm eligibility to marry in the UK.
It is important to note that if you live outside the UK but plan to marry in the UK, you will be subject to the marriage laws of your country of residence. In this case, you should obtain a document confirming there is no impeditiont to the marriage from your country of residence.
Contract Law: Can Agreements Override State Law?
You may want to see also
Explore related products
$12.95 $12.95

The UK prohibits certain blood relatives, step relatives, and relatives-in-law from marrying
In the UK, certain blood relatives, step relatives, and relatives-in-law are prohibited from marrying. The legislation is slightly different in Scotland compared to the rest of the UK, but the same provisions generally apply.
A man is prohibited from marrying his:
- Mother
- Daughter
- Sister
- Aunt
- Niece
- Granddaughter
- Grandmother
A woman is prohibited from marrying her:
- Father
- Son
- Brother
- Uncle
- Nephew
- Grandson
- Grandfather
Additionally, adopted children may not marry their genetic parents or grandparents, even if they were unaware of their relation. They are, however, permitted to marry their adoptive siblings.
In the UK, marriage between cousins, even first cousins, has always been permitted. However, marriage between in-laws (if a previous partner had died), who had no blood relationship, was not allowed until 1907.
If you are not a UK citizen and intend to marry in the UK, you will be subject to the marriage laws of your country of residence. You will need to provide a document from your country confirming that there is no impediment to the marriage, as well as a visa if you plan to remain in the UK after the ceremony.
State Agencies: Federal Law Enforcement Partners?
You may want to see also
Frequently asked questions
No, a man cannot marry his sister-in-law in the UK. Marriage between in-laws, even if a previous partner had died, is not allowed.
The Deceased Wife's Sister's Marriage Act 1907 allowed a man to marry his dead wife's sister, which was forbidden before.
If you live outside the UK and intend to have your marriage ceremony in the UK, you will be subject to the marriage laws of your country of residence. However, you may need a visa and documentary evidence to confirm you are eligible to marry in the UK.
There are different residency requirements depending on where in the UK you wish to marry. There are no residency requirements in Northern Ireland or Scotland. If you live in England and Wales, you must have lived in the area covered by the register office for at least seven days before giving notice of your intention to marry.
Step-relations may marry under certain circumstances. Provided they are 21 or older, they may marry in a civil ceremony under a licence. The younger member of the couple must not have lived under the same roof as the older person before the age of 18 and must not have been treated as a child of the older person's family.











































