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Related video above: Duchess Meghan believes her new children's book shows 'another side of masculinity'

Meghan, Duchess of Sussex, said she hopes "any family" will see themselves represented in the pages of her children's book, "The Bench," in her first interview since speaking to Oprah Winfrey in March.

The Duchess said that "growing up, I remember so much how it felt to not see yourself represented," in an interview with National Public Radio's (NPR) Samantha Balaban.

"So any child or any family hopefully can open this book and see themselves in it, whether that means glasses or freckled or a different body shape or a different ethnicity or religion," Meghan said.

While the book opens and ends with depictions of Meghan's family, there is a diverse range of fathers and sons depicted throughout the story.

"This story that I wrote for my husband and son could really be your story also," she told the radio station's children's book series, "Picture This."

Earlier this year Meghan and her husband Prince Harry sparked a heated conversation about racism, the British tabloid press and the royal family following their bombshell interview with Oprah Winfrey.

Quiet moments

Meghan's book was published last month. It is inspired by Prince Harry and their son Archie Harrison, and is about relationships between fathers and sons, depicted in quiet moments spent on benches.

Meghan said that "especially in this past year," against the backdrop of a global pandemic, that "so many of us realized how much happens in the quiet."

"So, in this story, I'm observing this love between my husband and our son and imagining what it will be as they have more shared moments as our son gets older," she said.

"From scraping a knee to having a heart broken, whatever it is that they always reset at this bench and have this moment to bond," Meghan added.

The book emerged from a poem and bench that Meghan gave Harry for his first Father's Day. The interview, to be aired Sunday, marks the couple's second Father's Day.

It was recorded before the birth of their second child, Lilibet Diana, who was born earlier this month.

Their daughter was named after her great-grandmother, Her Majesty The Queen, whose family nickname is Lilibet. Her middle name, Diana, was chosen to honor her late grandmother.

Meghan said award-winning illustrator Christian Robinson included small details in the book that her son Archie would pick up on, and subtle nods to the late Princess Diana.

"I think you can find sweet little moments that we've tucked in there -- from my favorite flower, even my husband's mom's favorite flower, forget-me-nots," Meghan said.

"We wanted to make sure those were included in there. There's a lot of, a lot of special detail and love that went into this book," she said.

Harry and Meghan were married in a lavish wedding at St. George's Chapel in Windsor, England, three years ago.

They stepped back from their roles as senior working royals last year, relinquishing their HRH titles, and now live in Santa Barbara, California.

The Duke and Duchess of Sussex are celebrating their son Archie’s second birthday Thursday.

The royal family has been wishing the toddler a happy birthday across social media, with the official Royal Family Instagram account sharing a sweet photo of him with his parents Prince Harry and Meghan at Windsor Castle in 2019.

Other royal family members also celebrated the day, including Prince Charles and the Duke and Duchess of Cambridge, who shared memories from Archie's Christening in July 2019.

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Archie Harrison Mountbatten-Windsor was born at 5:26 a.m. on May 6, 2019, at the Portland Hospital in London.

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Days before Archie's second birthday, Meghan revealed that she would publish a children's book that's inspired by her son and her husband, Prince Harry.

"The Bench" will be an illustrated story told through a mother's eyes, and will look at the "special bond between father and son." It was first written as a poem by Meghan for Harry to mark Father's Day in 2019.

"Evoking a deep sense of warmth, connection, and compassion, 'The Bench' gives readers a window into shared and enduring moments between a diverse group of fathers and sons - moments of peace and reflection, trust and belief, discovery and learning, and lasting comfort," a statement from the book's publisher read.

Earlier this year, the Sussexes revealed that they are expecting their second child, a girl.

Harry and Meghan first announced that they were expecting again on Valentine's Day. At the time, the couple released a black-and-white photo of themselves together taken remotely by their longtime friend, photographer Misan Harriman.