Good Morning America host Robin Roberts took to her Facebook page Sunday to acknowledge publicly for the first time that she's gay.

In a heartfelt message to her fans, the 53-year-old anchor celebrated her blessings of 2013 and those who have contributed to her recovery. In doing so, she paid homage to her longtime girlfriend, Amber Laign.

"I am grateful for my sister, Sally-Ann, for being my donor and giving me the gift of life," Roberts wrote. "I am grateful for my entire family, my long time girlfriend, Amber, and friends as we prepare to celebrate a glorious new year together."

Roberts and Laign have reportedly been together for 10 years and the girlfriend has been by the reporter's side throughout her breast cancer diagnosis and bone marrow transplant in September 2012, Us Weekly noted.

Who is Amber Laign? PHOTOS

Laign is a licensed massage therapist who specializes in treating patients recovering from injuries, sources said.

Earlier reports indicated that Roberts was dating Storm Sahara, a writer, stylist and independent film director. But Roberts cleared up those rumors and confirmed it is Laign whom she has been in a relationship with. See photos of Laign here.

Sunday marked the one-year anniversary of Roberts' 100 days post-transplant.

"Flashback 12/29/12....Hard to believe this was 1 year ago today..when I reached a critical milestone of 100 days post transplant," Roberts wrote.

ABC News issued a statement of support following Roberts' Facebook post, saying, "We love Robin and Amber, who we have all known for a long time. We were so touched by Robin's Facebook message today and so thankful for all the loving support she has in her life."

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Amber Laign, Good Morning America