One year ago today Robin Roberts was celebrating a clean bill of health 100 days after her blood marrow transplant. She now has another "critical milestone" under her belt. The Good Morning America host publicly acknowledged her longtime girlfriend Amber Laign for the first time in a Facebook post today.

"I am grateful for my entire family, my long time girlfriend, Amber, and friends as we prepare to celebrate a glorious new year together," she wrote on Sunday.

According to People magazine, the couple has been dating for 10 years, which means Amber was present during Robin's battle with cancer. Amber is a massage therapist who specializes in helping people recover from injuries.

Robin was diagnosed with breast cancer in In 2007. After surviving her battle, she was diagnosed with a rare blood disorder during remission five years later. Her sister, Sally Ann, who Roberts also thanked in the post, donated bone marrow for her transplant in September 2012.