Queen Elizabeth's nephew, the Earl of Snowdon, and his wife of more than 26 years have "amicably agreed" to divorce, a spokesman for the couple said Monday.
David Armstrong-Jones, who owns a high-end furniture company, is the son of Princess Margaret, who died in 2002, and is 21st in line to the throne.
He and his wife, Serena, were married in October 1993 and have two grown children, Charles Armstrong-Jones, Viscount Linley, and Lady Margarita Armstrong-Jones.
"The Earl and Countess of Snowdon have amicably agreed that their marriage has come to an end and that they shall be divorced," the spokesman for the couple said. "They ask that the press respect their privacy and that of their family."
The announcement comes at a tumultuous time for the royal family.
Prince Harry and his wife, Meghan, announced in January that they would "step back" from official royal duties. The couple hopes to become financially independent after contending with family rifts and relentless British tabloids.
Prince Andrew, the queen's second son, stepped down from public duties in November amid controversy surrounding his past friendship with accused sex trafficker Jeffrey Epstein, who killed himself last year.
And last week, the queen's oldest grandson, Peter Phillips, and his wife, Autumn, announced that they were divorcing after nearly 12 years of marriage.