In an exclusive clip from ‘In The Arena: Serena Williams,’ Olympia can be seen cheering and running after her parents break the news

Serena Williams, Alexis Ohanian, and their daughters Olympia and Adira

Serena Williams, Alexis Ohanian, and their daughters Olympia and Adira. Photo: Nine Two Six Media, LLC

Serena Williams’ daughter Olympia couldn’t wait to be a big sister.

In an exclusive clip shared with PEOPLE from the final episode of In The Arena: Serena Williams, the retired tennis pro, 42, and her husband Alexis Ohanian, 41, can be seen sitting down on the couch with their daughter Olympia, 6.

Williams lifts her bright blue T-shirt and rubs her baby bump, while Ohanian exclaims, “You’re going to be a big sister!”

The then 5-year-old cannot contain her excitement upon hearing the news and immediately jumps up and starts screaming. She then bolts around the room as her parents lovingly laugh. The clip concludes with a never-before-seen photo of the family of four, where Olympia and Adira smile with their parents.

Williams and Ohanian’s second daughter Adira turned one earlier this month, and the proud mother of two shared her love for both of her girls on Instagram to mark the milestone.

Serena Williams, Alexis Ohanian, and their daughters Olympia and Adira

Serena Williams, Alexis Ohanian, and their daughters Olympia and Adira.Nine Two Six Media, LLC

Posting a few throwback snaps on of herself with Olympia from her maternity shoot before welcoming Adira, the mother-daughter duo can be seen smiling in a bed of flowers wearing matching pink flowy dresses.

“Olympia is always there for me,” Williams said in her caption. “Before having a second child, I always wondered, ‘how could I love anything as much as I love @olympiaohanian?'”

She continued, “Then Adira came along … she is so special, so fun, so funny, so loving, so sweet and so strong!!! You see, God makes your heart get bigger. Because my love for Olympia has not dimmed. My heart simply now is doubled the size and I have a greater capacity to love more!”

Serena Williams Shares Sweet Photo of Daughters Olympia and Adira

Serena Williams Shares Sweet Photo of Daughters Olympia and Adira.Serena Williams/Instagram

Earlier in the day, Williams shared a few more sweet pictures from her previous photoshoot in honor of her little one’s first year.

In her first post, the mother of two wrote, “A year ago today – August 15th – I gave birth to my second baby girl, Adira River Ohanian. She is a true light. Here’s a peek inside my maternity shoot. @adiraohanian.”

In her second post, Williams posed with daughter Olympia and husband Ohanian, with Olympia kissing her mom’s stomach. She also shared a photo of her side profile, putting her two hands on top of and below her bump.

All eight episodes of In The Arena: Serena Williams presented by Morgan Stanley are available now on ESPN+.