Rhiannon Guibert


+44 745 297 6536
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Rhiannon is a consultant in the Family department. She advises on all areas of private family law including divorce and civil partnership dissolution, financial issues on separation and divorce, children matters, nuptial agreements, parental abduction and cases involving domestic abuse.

Rhiannon has a particular focus on high net worth divorces (supported by her previous experience as a finance lawyer), as well as complex children matters, and is often involved in cases with an international element.

Before joining SMB, Rhiannon trained at a Magic Circle law firm and worked in their Paris office for a number of years as a finance lawyer. She then followed her passion for family law and has worked in the family department at SMB for 9 years, being promoted to Senior Associate in 2019 before becoming a consultant in 2023.

Rhiannon regularly carries out pro-bono work for Rights of Women, and writes for Lexis Nexis as part of their expert panel.

A member of the Franco-British Lawyers Society, Rhiannon is fluent in French and has studied French law, passing the Paris Bar exam in 2014.

Practice areas
  • “I have only great thoughts and words for Rhiannon Guibert and Jane McDonagh. They completely understood how difficult my situation was and tried their best to achieve the desired outcome.”

    Legal 500, 2021
  • “Through all my own stress, horror, sorrow and fatigue, I feel immense gratitude for your perseverance and hard work. Thank you so much.”

    Client Testimonial
  • “I couldn’t have had better more supportive lawyers. I will always remember that and be grateful for everything you’ve done. I can’t thank you enough.”

    Client Testimonial, 2022