Prince Harry and Meghan Markle's daughter Lili appears to wear a hand-me-down hat from brother Archie in footage from their Netflix series

• Netflix's "Harry & Meghan" includes multiple clips of Prince Harry and Meghan Markle's children.
• In one shot, their daughter Lilibet appears to wear a hat that belonged to her older brother, Archie.

Lilibet Diana had a matching moment with her older brother in "Harry & Meghan."

Volume I of Netflix's docuseries about Prince Harry and Meghan Markle premiered on December 8, giving viewers a behind-the-scenes look at the couple's relationship and their lives as senior royals.

The series also included photos and videos of Meghan and Harry's children, Archie and Lilibet, who they call Lili.

Episodes one through three offered insights into what Archie, 3, and Lili, 1, are like, including Archie's American accent and his interest in his grandmother Princess Diana.

Episode one in particular also showed something the two children share: a hat.

At the end of 2019, Meghan and Harry shared a video montage on Instagram of their year.

It included a photo of Prince Harry holding Archie in front of a body of water.

In the photo, Archie wears the gray Cocobear hat with two pom-poms from the New Zealand charity Make Give Live, which fights loneliness with knitting.

The organization gave Meghan and Harry a hat when they were visiting New Zealand in 2018, and Meghan later purchased two more, including the gray one seen in the photo, as co-founder Claire Conza told The Londoner in January 2020.

Sales of the $45 hat boomed after Harry and Meghan shared the photo of Archie.

And it seems Meghan and Harry kept the hat despite Archie's growing head, as Lili appeared to be wearing the same cap in a video featured in "Harry & Meghan."

At the beginning of episode one, Meghan feeds her and Prince Harry's chickens while Lilibet is strapped to her chest in a baby carrier.

The video doesn't show Lilibet's face, but she's seen wearing the gray hat with a matching gray ensemble.

The trailer for volume II of the series also included a family photo of the Sussexes in silhouette, with Meghan and Lilibet looking at each other while she sits on her father's shoulders and Meghan holds Archie.

Volume II of "Harry & Meghan" drops on Thursday.