DWAYNE Johnson has praised Paul Walker's passion and commitment for "marine conservation".
The 'Hercules' star - also known by his wrestling name 'The Rock' - has paid tribute to his late friend, describing him as a "dear friend" and recongising his work for marine life.
In a video posted on his Instagram account, Dwayne said: "Paul Walker was not only an incredible actor, dear friend, loving and devoted father ... but he was also a champion for shark and marine conversation, whose efforts inspired so many."
The clip was filmed for 'Shark Week' on the Discovery Channel, and will serve as an introduction to one of Paul's "final missions".
Writing alongside the clip, the late actor's 'Fast & Furious 7' co-star said: "[I] Was moved to shoot this very special intro to one of Paul Walker's final missions for shark and marine conservation.
"#DiscoveryChannel #SharkWeek #ProtectingThatWhichILove #MissYouBrotherPaul."
Dwayne has previously opened up about his friend - who died in a car crash in November 2013 - and revealed they bonded over talking about their children.
He has said: "It was always the number one topic we would talk about.
"We would talk about silly guy things, his fast cars and my pickup trucks, or we would talk about the beautiful energy of Hawaii -- but it always ultimately came back to family.
"And very specifically the beautiful and important bond between a father and his daughter, and how we both realised that over the years."
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