LONDON —The British label Amanda Wakeley said today it has secured “significant” financial investment from private equity firm AGC Equity Partners.

The investment follows the restructuring of the business by Wakeley three years ago. The funds will be used to develop Amanda Wakeley as a luxury lifestyle brand, the company said in a statement.

“This investment means that we now have the strongest operational and financial base in the company’s history,” said Wakeley, the company’s founder and creative director.

“I have been continually pressed by our incredibly loyal customers to broaden the core fashion concept into a wider, lifestyle offering and with our new investor, I look forward to realizing this plan.”

Financial terms were not disclosed.

Laurent Souviron, a partner at AGC said: “Amanda is ready to take her brand to the next level, and we are delighted to provide the capital to fund that new development phase.”

AGC, which launched in 2009, bills itself as a global alternative asset investment firm operating from offices in London and the Middle East. According to the company, it is predominantly focused on private equity strategies.

Sagra Maceira de Rosen acted as an adviser, and the statement said she would continue to work with the Amanda Wakeley board following the transaction.

Amanda Wakeley launched her label in 1990, and is best-known for her ultra-feminine shapes, elegant day and evening wear, and her wedding gowns.

The brand operates a flagship store on Fulham Road in London, and sells at retailers including Harrods and Harvey Nichols. The label is a favorite of the Duchess of Cambridge who often chooses Wakeley’s suits and gowns for official engagements.

In 2009, Wakeley’s own investment vehicle, AW Atelier LLP, bought back the company for an undisclosed sum from Jason Granite, a corporate restructuring specialist who in 2008 had bought the business from Wakeley’s longtime investor, Walid Juffali. The 2009 deal marked the first time that the designer had owned her own label in more than a decade.