Serena Williams announced she's expecting a baby with fiance Alexis Ohanian.

SERENA WILLIAMS BEATS BIG SISTER VENUS FOR RECORD WIN

The tennis star, 35, shared a picture of her growing baby bump on Snapchat with the caption "20 weeks."

SERENA WILLIAMS REVEALS ENGAGEMENT RING

Williams and her Reddit co-founder fiance, 33, announced their engagement in December.