Billie Lourd Says She 'Will Never Stop Missing' Mom Carrie Fisher as She Marks 9 Years Since Her Death

Fisher died on Dec. 27, 2016, at the age of 60 after going into cardiac arrest on a flight

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Billie Lourd is marking nine years since her mom Carrie Fisher's death

In a lengthy post on Instagram, Billie said she will "never stop missing" her mom and reflected on how Fisher "lives on through" the joy she experiences with her kids

Fisher died on Dec. 27, 2016, at the age of 60 after going into cardiac arrest on a flight

Billie Lourd is remembering her mom, Carrie Fisher, on the ninth anniversary of her death.

On Saturday, Dec. 27, Billie, 33, shared a touching post on Instagram, sharing that she will "never stop missing" her mom and reflecting on how Fisher "lives on through" the joy she experiences with her kids.

After recounting a sweet early morning moment she had with her 3-year-old daughter, Jackson, Billie wrote about the special bond Jackson shares with Billie's father, Bryan Lourd — and how Fisher is at the heart of it.

"[They are] like 2 old souls that have known each other forever," she said of Jackson and Bryan. "Watching my dad with my kids is one of the greatest joys I’ve ever known. … Then I started thinking about how this joy wouldn’t be possible without my mom. This joy only exists because she existed."

"So even though she is not physically part of this joy, she is part of the reason for it," Billie continued. "Even though she is not alive she lives on through this joy. My grief takes on many shapes - today, right now in this moment, that shape is this joy I get to experience watching my kids with my dad."

"Thank you momby. I will never stop missing you," she concluded her post, which featured a 25-year-old photo of Fisher and Bryan with a young Billie, as well as a recent Christmas photo of Bryan embracing Jackson and Billie's son Kingston, 5.