Serena Williams shares her pregnancy news with daughter Olympia, five, in adorable YouTube video

Serena Williams told her daughter that she’s going to be a big sister in a cute baby YouTube video posted on her channel on Tuesday.

The 41-year-old tennis superstar — who revealed earlier this month that she’s pregnant with her second child on the Met Gala red carpet — documented the moment she told Olympia, five, the happy news.

The clip, titled “Olympia’s Surprise,” began with Serena showing the camera a close-up of a positive pregnancy test, which showed she was “super happy.”

Serena then recalled a funny anecdote when she told the camera that Olympia didn’t know she was pregnant yet, but did call her “fat” and was “stressed out” by her weight gain.

Later in the video, the athlete was joined by her husband Alexis Ohanian, 40, as they broke the news to the little girl, who was overjoyed and started running and screaming with excitement.

Sheer joy: The athlete, 41, was joined by her husband Alexis Ohanian, 40, as they broke the news to the little girl, who was overjoyed and started running and screaming with excitement

Serena looked classy in a Gucci sweater and blazer as she began the video chatting to the camera vlog-style.

“Olympia doesn’t know I’m pregnant right now, but she did call me fat, and then she got really stressed,” she told the camera.

“She was like, ‘Mommy, you’re fat,'” Serena shared, imitating Olympia’s distraught voice.

“I’ve tried not to take it personally because I’m super into fitness, but I’m like, ‘Uhh, am I?'”

“I’m really, really excited to see her reaction,” she added.

In the next clip, the family was sitting on the couch, with Olympia looking adorable in floral pajamas as she sat between her parents.

“Do you remember how you prayed for a sister or brother?” Serena asked her.

“Well, we went to the doctor and it turns out I’m not getting fat,” Serena said as her husband laughed.

Baby on board: The clip started with Serena showing the camera a close-up of a positive pregnancy test, which showed she was ‘super happy’

Funny: Serena then recalled a funny anecdote when she told the camera that Olympia didn’t know she was pregnant yet, but did call her “fat” and was “stressed out” by her weight gain

Cheeky: ‘Olympia doesn’t know I’m pregnant yet, but she called me fat, and then she really felt like stress. She was like, “Mommy, you’re fat,” Serena said

Sweet: The following clip featured the family sitting on the couch, with Olympia looking adorable in floral pajamas as she sat between her parents

Not fat: “Do you remember how you prayed for a sister or brother?” Serena asked her. “Well we went to the doctor and it turns out I’m not getting fat,” Serena said as Alexis laughed

Big sister: “But I have a baby in my belly,” she revealed. “What, are you kidding me?” asked Olympia happily. “You’re going to be a big sister,” Alexis told her

“But I have a baby in my belly,” she revealed.

“What, are you kidding me?” asked Olympia happily.

“You’re going to be a big sister,” Alexis told her.

An overjoyed Olympia then gave her mom a hug, before Serena asked if she wanted to see her belly.

The Michigan-born star then unbuttoned her jeans and lifted her blue T-shirt to reveal her baby bump.

Seeing Serena’s belly, Olympia jumped off the couch and screamed with excitement as she circled the couch.

Serena then shared the process of getting ready for the Met Gala, where she would officially debut her baby bump.

“Getting ready for the Met is super special. It’s the biggest red carpet of the year.”

Before the official reveal: Serena then shared the process of preparing for the Met Gala, where she would officially debut her baby bump

Special: ‘The preparations for the Met are very special. It’s the biggest red carpet of the year,” she said

Gucci Accessories: The clip then showed off some Gucci jewelry and accessories

Sketch of the dress: Serena showed a sketch of the Gucci dress she would wear to the event

Big moment: “Today at the Met is such a big moment for me. I’m revealing to the world that I’m pregnant,” she said as the footage showed the couple in the back of the car on their way to the event.

Iconic: “One day they will look back and see, that’s how Mom expressed herself and told everyone she was pregnant with you. And you want this moment to be totally iconic’

Time to celebrate! After the pair walked the red carpet, the video ended with Serena showing off her after party outfit as she said, “And now it’s time to party”

The video showcased an array of different jewels and accessories as Serena revealed she would be wearing Gucci.

“Today at the Met is such a big moment for me. I’m revealing to the world that I’m pregnant,” she said as the footage showed the couple in the back of the car on their way to the event.

‘I’m expecting my second child, which is exciting. This is a very important time where this is the look I’m going to show my daughter or son when they are born.”

“One day they’ll look back and see, this is how Mom expressed herself and told everyone she was pregnant with you.”

“And you want this moment to be totally iconic, and totally fresh, but still very special.”

At the end of the video, the couple could be seen on the red carpet, with Serena saying, “I think it went well. We walked the red carpet. We’ve made the announcement. And above all we had a fantastic time.’

On the red carpet, Serena showed off her belly in a striking black dress that hugged her curves.

It had angular rhinestone trim on the hem and billowing, sheer pleated sleeves that draped dramatically around her arms.

Striking baby reveal: During the red carpet reveal, Serena showed off her bump in a striking black Gucci dress that hugged her curves

Serena’s dress had a deep, glamorous collar that emphasized her cleavage, though she topped it off with several chunky strings of pearls draped around her neck.

The video ended with Serena showing off her after-party outfit look, sporting a black miniskirt and a white blazer, as she said, “And now it’s time to party.”

Williams and the Reddit co-founder have been married since 2017.

Serena had previously said she wanted another child after announcing her retirement from tennis last August.

At the time, she said she would “evolve away” from the sport.