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After nearly nine months of silence, Rihanna will speak out for the first time on her relationship with ex-boyfriend Chris Brown.

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In an exclusive interview to air on ABC's Good Morning America on Thursday and 20/20 on Friday, the 21-year-old star "tells her story," according to a network promo.

Although Brown -- who was sentenced to five years of probation, 180 days of community labor and a year of domestic violence classes for assaulting Rihanna last February -- has publicly apologized for his "inexcusable" actions, she has not yet made any public statements about what happened.

According to an ABC press release, she will sit down with Diane Sawyer, "revealing publicly for the first time what happened last February." In the in-depth interview, Rihanna will also speak "candidly about growing up in Barbados, her family life, and how she has been doing over the last nine months."

The interview kicks off her promotional tour of her highly anticipated fourth album, Rated R, which will be released Nov. 23.