The Bidens adopted Willow into the White House in January 2022.
Willow was named after First Lady Dr. Jill Biden's hometown of Willow Grove, Penn.
The President appears with his rescue dog at the Delaware Humane Association headquarters in 2018.
President Joe Biden's wife Jill Biden appears with their German Shepherds in a 2020 election campaign photo.
The President appears with First Lady Michelle Obama, daughters Sasha Obama and Malia Obama and their Portuguese Water Dogs in the Rose Garden of the White House in 2015.
The President pets his family's Portuguese Water Dog, their first White House pet, at the White House in 2012.
The President carries his dog near his ranch in Crawford, Texas in 2003.
The President plays with his family's cat at the Governor's Mansion in Austin, Texas before they moved to the White House.
The President appears with his famiky's dog outside the White House in 1999.
The President carries his family's cat on the grounds on the White House in 1993.
The President and First Lady Barbara Bush ride with their dog on a golf cart at their home at Walker's Point in Kennebunkport, Maine, in 2004. Millie lived with them at the White House. He served as U.S. leader between 1989 and 1993.
The President sits with his granddaughter, Marshall, and one of his dogs in this undated picture.
The President presents wife Nancy Reagan with an early Christmas present: A King Charles Cavalier Spaniel.
The President and First Lady Nancy Reagan pose with one of their dogs and kittens at Rancho del Cielo, their vacation home near Santa Barbara, Calif., in the '80s.
The President plays with his family's dog on the South Lawn of the White House in 1978.
The President plays with one of his golden retrievers in 1976.
Yuki is believed to be the first rescue dog to live at the White House. Johnson's daughter Luci found him at a Texas gas station in 1966. Here he is photo-bombing the President as he signs a bill in 1967.