PARIS (AP) — It’s a girl? Serena Williams wants everyone to slow down with all of that “It’s a girl!” talk prompted by sister Venus.

The pregnant tennis star sent out a tweet Thursday to “clarify what Venus said” after the older sibling appeared to accidentally let something slip during a TV interview with Eurosport at the French Open by blurting out about the baby, “She’s going to call me ‘Favorite Aunt.'”

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Venus’ use of the pronoun “She” led folks to figure that meant Serena is expecting a girl.

But a day later, Serena wrote: “I think the surprise of knowing what you are going to have on that very special day you give birth is prob the best surprise you can ever have.”

NEW YORK, NY - MAY 01:  Alexis Ohanian (L) and Serena Williams attend the "Rei Kawakubo/Comme des Garcons: Art Of The In-Between" Costume Institute Gala at Metropolitan Museum of Art on May 1, 2017 in New York City.  (Photo by Dimitrios Kambouris/Getty Images)

Alexis Olhanian & Serena Williams (credit: Dimitrios Kambouris/Getty Images)

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She continued: “I did not grow up with brothers, only sisters and we all say ‘she’ more than ‘he.'”

Serena announced her pregnancy with Reddit co-founder Alexis Olhanian in April, but has not hinted at the baby’s gender.

She is due in the fall and is taking the rest of this season off, but plans to return to the tour in 2018. Serena sat in the stands during Venus’ second-round victory at Roland Garros on Wednesday.

Venus takes on Elise Mertens in the third round of the French Open on Friday.

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