Emma Stone — who plays Billie Jean King in the upcoming film “Battle of the Sexes” — will be at the US Open women’s finals, Page Six has exclusively learned, to honor the tennis legend.

The US Tennis Association will celebrate the 50th anniversary of King’s 1967 triple crown win with a pre-match ceremony where Stone, songwriter Sara Bareilles (who contributed original song “If I Dare” to the film) and USTA president Katrina Adams will pay tribute to King.