Meadow Walker is keeping her late dad Paul Walker’s memory alive.

The Fast and Furious star’s only daughter marked what would have been his 51st birthday Sept. 12 with a touching message, remembering her father as her “best friend.”

“I love and miss you so much every day,” Meadow wrote in a social media post, alongside a throwback photo of her dad smiling and looking down at her as a child. “Thank you for everything. My forever guardian angel.”

The 25-year-old Meadow also used the day to unveil a special edition t-shirt featuring a vintage image of Paul on set of the Fast franchise, with the new merch benefiting a cause he cared for deeply during his lifetime.

“By purchasing this tee you’re not only honoring my father’s legacy but also supporting the Paul Walker Foundation Scholarship,” she explained of the organization she founded in 2015 in his honor, “empowering young minds dedicated to ocean conservation and environmental protection.”

The actor—who studied marine biology in college—died Nov. 30, 2013 in a fatal car crash. And in the years since, Meadow has made it her mission to keep his legacy going, including sharing memories like  on the 10th anniversary of the tragic accident in 2023 when she shared a video of her surprising her dad, who is seen laughing and smiling as he pulls her in for a hug.

She’s also remained close with his Fast family, with his costar Vin Diesel walking her down the aisle at her 2021 wedding to Louis Thornton-Allan, from whom she is now separated. Meadow also officially joined the franchise by making a cameo appearance in 2023’s Fast X.

And even in his absence, Meadow still feels his spirit in unique ways.

“For me, it's numbers, four and seven are my dad's favorite numbers," she told E! News in 2023. “And I swear whenever I'm doubting anything or whenever I'm in an argument with someone or anything, I start seeing four and seven everywhere. So I always know that it's him.”

Keep reading below for more of Paul and Meadow’s sweetest moments together.

Meadow Walker shared a text message between her and dad Paul Walker's co-star Vin Diesel, with Vin writing, "Where the brotherhood began" with prayer emojis.

The image showed Paul and Vin at an event for the first Fast & Furious film from 2001.

"20 years later," Meadow captioned in June 2021 ahead of the F9 premiere.

Meadow simply captioned "miss you" to a series of throwback photos of her and dad Paul celebrating her birthday on May 22, 2021. 

"Legend. Miss you," Meadow wrote in April 2021 under a screenshot of a text message showing her and a cartoon Vin together. 

The father-daughter duo took a nap together as Paul held Meadow in his arms.

"A silly day to remember in sadness," Meadow captioned on Nov. 30, 2020, the seven-year anniversary of his fatal accident. "Today's a celebration of the love and happiness you brought to the world. Here's a photo of my best bud & I napping." 

Paul was a picture perfect father while holding a camera to capture daughter Meadow's curtsy.

"Miss you so so much, best friend forever and ever," Meadow wrote in October 2020. 

"The moment I realized we are twins," Meadow captioned a gorgeous photo of her and dad on Sept. 12, 2020. "Happy birthday to the most beautiful soul." 

Meadow captioned a cute pic of her and Vin's kids: "family forever."

It's clear Paul and Vin were more than just Fast & Furious co-stars. 

The adorable father-daughter duo played together in a throwback photo. Meadow described the moment as her "happy place" in May 2020 Instagram post.

Meadow shared a never-before-seen video of her surprising dad Paul. 

"I never thought I'd share this. But it felt right," Meadow wrote in April 2020. "Be good. I love you. Stay safe. xx" 

Paul grinned beside daughter in a sweet snapshot. "happy birthday to the loveliest soul I'll ever know," Meadow captioned the throwback pic on Sept. 12, 2019. 

A young Meadow flashed a big smile to the camera in this throwback photo she posted to Instagram in April 2015.

The then-16-year-old shared the pic shortly after attending Coachella, where she hung out with Fast and Furious friends Vin and Elsa Pataky.

Meadow shared this cute flashback photo to Instagram in memory of her unforgettable dad for Father's Day 2015.

Sharing this adorable pic with her proud daddy on his 41st birthday, Meadow wrote on Instagram, "Happy Birthday, I love you."

On the first anniversary of her dad's tragic death, Meadow posted this touching tribute photo on Instagram, simply saying, "I love you."

"Reflecting on my father, I found myself reflecting on his passions," wrote Meadow on her inaugural Instagram post for The Paul Walker Foundation on September 12, 2015. "His passion for the ocean, his passion for rescuing animals, his passion for helping people and his passion for spontaneous goodwill. I wanted to start this foundation because I want to share that piece of him with the world."

Meadow posted this super cute pool pic to Instagram on July 20, 2016, to raise awareness for The Paul Walker Foundation and its mission to "do good."

On the website, a quote by film producer Brandon Birtell about his close friend is featured on the main page: "Paul was the kind of person that valued and respected others. He would go out of his way to do the simplest things from stopping to open the door for others, making sure he looked someone in the eye when they were speaking, or help someone that clearly needed to be helped." 

Paul's daughter posted this throwback photo of the two dancing together on September 12, 2017. She encouraged her followers to do good, writing, "In honor of my dad's birthday today, we're challenging you to DO GOOD!"

Gleefully sticking out her tongue, little Meadow joked with her dad in this flashback photo.