(TIML NEWS) Mathew Knowles is opening about his battle with breast cancer.

For the first time, Beyoncé and Solange’s father reveals his diagnosis and fight against the disease during a sit-down interview with ABC’s “Good Morning America,” which will air in full on Wednesday. In a teaser, which was tweeted by “GMA,” host Michael Strahan asks Knowles how his family reacted to the news.

“How was it to tell your family about the diagnosis?” Strahan asks the 67-year-old entrepreneur.