Serena Williams is sharing an emotional tribute to sister Venus Williams following her wedding to Andrea Preti. "My sister's keeper. Venus, where do I even begin?" Serena, 44, wrote on Instagram alongside a series of photos from Venus' nuptials. "From the backyard courts to the biggest stages in the world, you've always led with grace, strength, and a heart bigger than any trophy. Watching you step into this next chapter surrounded by love felt like watching the sun rise...steady, powerful, and full of promise.