Anna was one of Oscar's closest confidantes and was even behind the creation of Oscar's gowns for Amal Clooney on her wedding day and Michelle Obama just two weeks ago.
Anna reportedly called the first lady, knowing that Oscar was at the end of his life, and told her that if she didn't wear one of his gowns soon, she could be one of the only first ladies not to wear an Oscar creation. Hillary Clinton, Laura Bush and Nancy Reagan all wore gowns by the designer.
"These women knew that Oscar would have the power, the talent, the gifts to understand who they were as individuals and make them look great in their roles as first lady," said former Vogue editor Andre Leon Talley who curated a de la Renta tribute at a Clinton Presidential library last year.
After Oscar's death on Oct. 20, his family is reportedly holding a private memorial for him at his Connecticut home tomorrow with a bigger service reportedly being planned for next month at New York's Metropolitan Museum of Art.