Maisy Biden made a fashion statement at the White House State Dinner in October, celebrating the Prime Minister of Australia. Wearing a [pant]suit and a white bow tie, Maisy joined her sisters Finnegan and Naomi, and her brother-in-law Peter Neal, for the big event. Here, get to know President Biden's third-eldest grandchild: Maisy Biden was born in 2001, the youngest daughter of Hunter Biden and Kahleen Buhle. She has two older sisters, Finnegan Biden and Naomi Biden, and a younger half-brother, Beau Biden. She attended high school at Sidewell Friends with Sasha Obama, and the two were reportedly close.