"Hallie and I are incredibly lucky to have found the love and support we have for each other in such a difficult time, and that's been obvious to the people who love us most," he explained. "We've been so lucky to have family and friends who have supported us every step of the way."
Page Six also reports that former Vice President Joe Biden confirmed the relationship, and that he and his wife, Jill, have given their blessing to the couple.
"We are all lucky that Hunter and Hallie found each other as they were putting their lives together again after such sadness," he told the outlet in a statement. "They have mine and Jill's full and complete support and we are happy for them."
As ET previously reported, Beau, the son of the former vice president, died at the age of 46 in May 2015 after battling brain cancer. He fathered two children with Hallie, a 12-year-old daughter, Natalie, and a 10 -year-old son, also named Hunter.
Kathleen and the elder Hunter, who share three children together -- Naomi, Maisy and Finnegan -- separated five months after Beau's death in October 2015, according to Page Six.