Serena Williams has captured the heart-warming moment she told her five-year-old daughter she is soon to be a big sister.

The 41-year-old tennis legend is pregnant with her second child, announcing her big news on the Met Gala red carpet at the beginning of May.

Serena and her husband Alexis decided to film the moment they told their daughter Olympia about the newest addition to their family, with the five-year-old’s joyous reaction tugging at the heartstrings.

In a video uploaded to Serena’s YouTube channel, titled Olympia’s Surprise, Williams revealed Olympia did not yet know about the pregnancy, adding her daughter noticed she had become “fat”.

“Olympia does not know right now that I am pregnant, but she did call me fat and then she got really, like, stressed out,” Williams said as the video started.

“She was like ‘Mummy, you’re fat’”.

“I tried not to take it personal, ‘cause I’m, like, super into fitness, but I’m, like, ‘Uhh, am I?’”.

“We’re going to tell her (about the pregnancy) and I’m really, really excited to see her reaction.”

The video continues with the family sitting on the lounge as Williams prepares for the big announcement.

“Remember how you’ve been praying for a little sister or brother?” Serena asked Olympia.

“Well, we went to the doctor, and it turns out I’m not getting fat. But I have a baby in my belly.”

Olympia’s face then lit up with joy and excitement as she replied: “What, are you kidding me?”

“You’re going to be a big sister,” Ohanian and Williams both said.

Olympia reacted with joy and reached out and hugged Williams in a beautiful family moment.

The video continued as Williams unbuttoned her jeans and lifted her T-shirt to reveal her baby bump, with Olympia overcome with excitement as she jumped off the lounge and screamed with joy while running around the living room.

The video has racked up over 40,000 videos in 24 hours, with many fans flooding the comment section with well wishes.

One fan wrote, “I don’t think there’s anyone who deserves this happiness more than Serena. She has blessed us with 3 decades of amazing tennis… What a great way to live life now.”

Another said, “Olympia is so excited… You deserve it all, Serena.”

Image credits: YouTube

This article first appeared on Over60.