Wake Forest University spokeswoman Katie Neal said Friday that Clinton will attend the event honoring Angelou on the North Carolina campus where she taught for more than 30 years. Oprah Winfrey Network spokeswoman Chelsea Hettrick said the TV talk-show host and producer also will attend Saturday's memorial.
The White House said Mrs. Obama will deliver remarks.
Angelou died last week at her Winston-Salem home at age 86. She was known worldwide as a literary pioneer and civil rights champion.