The model paid tribute to the late "Fast & Furious" actor, who died in a car crash in 2013, calling him "the best parent in the world."
The "Fast and Furious" star also paid tribute to Paul Walker in his revealing Instagram post.
"Not a day goes by that I don’t reflect [on] the brotherhood we were blessed to have," Diesel wrote of his Fast & Furious co-star and close friend. "But you know that."
"I’ve come a very long way," the model wrote with a photo taken in 2019. "Bye bye tumor."
Why are the "Fast & Furious" franchise stars The Rock and Vin Diesel publicly fighting? We take you step by step through their squabble.
Diesel stepped in for his late "Fast & Furious" co-star on his goddaughter's wedding day.
Model Meadow Walker, daughter of the late Paul Walker, wed Louis Thornton-Allan in an intimate ceremony in the Dominican Republic.
"I know you were there with me in spirit," Diesel wrote to his late "Fast & Furious" co-star.
The "Fast & Furious" actor would have been 48 on Sept. 12.
Cook and Walker both starred in the 1999 teen film.
Paul Walker's daughter, Meadow, is engaged to Louis Thornton-Allan.
Vin Diesel looks back at the start of a billion dollar franchise and talks about keeping Paul Walker's character Brian alive onscreen as "The Fast and the Furious" turns 20.
Walker died tragically in a 2013 car crash at 40.
"Eternal brotherhood is a blessing beyond words," Vin Diesel wrote in his tribute to the late actor
"Family," Paul Walker's daughter Meadow captioned a photo of her snuggling up to her godfather and her late dad's Fast & Furious costar Vin Diesel and his daughter Similce
Director Justin Lin's latest sneak peek confirms the "Fast and Furious" franchise will blast off. Meanwhile, fans flipping out over revelation that Paul Walker's character is still alive in the "Fast" universe.
Paul Walker's 22-year-old daughter is making a splash in the fashion industry.
Freddie Prinze Jr. chokes up over the relationship he should have had with his "She's All That" co-star Paul Walker.
Paul Walker in a November 2013 car crash at the age of 40 — just weeks after his daughter Meadow turned 15
Paul Walker's daughter Meadow is keeping his memory alive on what would have been his 47th birthday.
Vin Diesel is the godfather of the late Paul Walker's 21-year-old daughter, Meadow
Paul Walker tragically died at 40 years old in 2013 when his only child, daughter Meadow, was 15 years old.
Meadow Walker is seen surprising the actor on his birthday in the video, which got reactions from Gal Gadot and Tyrese.
The clip features Meadow surprising her dad one year for the actor's birthday
Walmart Apologizes for Paul Walker Tweet Posted in 'Poor Judgment'