Edwina Bartholomew, 41, announced that she had been diagnosed with chronic myeloid leukaemia as she hosted Sunrise.
Visibly emotional, the presenter described the cancer as a "good kind" that can be treated with a daily tablet.
"I thought I could keep it together," Bartholomew told viewers through tears.
She explained that she wanted to share her diagnosis publicly as a thank you to viewers for their continued support.
