Dwayne 'The Rock' Johnson honors late 'friend' Paul Walker on his birthday in moving post

Dwayne "The Rock" Johnson paid tribute to his late friend and co-star Paul Walker on what would have been his 46th birthday.

The two grew close on the set of the "Fast & Furious" franchise movies.

"I never post about my friend. It’s a personal thing, but I prefer to keep our memories and bond private and quiet," Johnson wrote on Thursday.

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"But something about today compelled me as a moving reminder of how fragile life is for all of us. It’s Paul’s birthday and rightfully so, his legacy celebrated around the world. Our friendship was bonded over our daughters and the pride and protection we took being their fathers," the "Hobbs and Shaw" star continued.

"And recently, I got a scare when I almost lost another friend on the road," Johnson said, in reference to Kevin Hart's recent car accident, which put the comedian -- who sustained major back injuries -- in the hospital.

"All this stuff got me thinking about how beautiful, yet wildly unpredictable life is," Johnson added. "We never know what’s around the corner, so we gotta live as greatly as we can in the honor of our loved ones and ancestors who are no longer with us. Manuia le aso fanau, my friend."

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Walker tragically died in November 2013 in a car accident in Santa Clarita, California. He was 40 years old and had one daughter, Meadow Walker, now 20 years old.

His other "F&F" co-stars also wrote emotional tributes to Walker.

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"Normally today I would be planning how to embarrass you with a birthday cake. Haha," best friend Vin Diesel wrote. "Instead I reflect on how lucky I am to call you my brother. The tears never go away, but they change... from that of mourning to that of grace. We only hope to make you proud. Speaking of which, guess what message I woke up to... your daughter. Meadow sending me love on this day. Wow, she knows me so well. She has your heart. Happy birthday... it's amazing, but somehow you continue to make the world a better place."

"Dear Paul, I miss you everyday bro with my whole heart!" shared Tyrese. "You were truly a friend and brother in deed....: Your trailer on set was always next to mines. You gave some of the best hugs... Your laughter was infectious once you started laughing it would change the mood of any room or anyone that was around...."

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Ludacris penned, "Happy Bday Big Bro. Your Legacy Will Always Be Alive & Your Presence Felt Everywhere."

"Happy Birthday P-Dubbs. You really hated it when I called you that," said Jordana Brewster, who played his love interest. "I miss your laugh, your giant hugs, your ability to make everyone feel seen. I miss you every day. Your legacy lives on everyday through your beautiful daughter Meadow."