Actor Rio Hackford, best known for his roles in ‘The Mandalorian‘, and ‘American Crime Story’, has died at the age of 51. 

Speaking to Variety, Hackford’s brother Alex Hackford said he died on Thursday in Huntington Beach, California, after a brief illness.

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Following his death, several of his friends took to social media to pay tribute to the actor. 

“Rio was more attuned to experience than anyone I’ve ever known,” screenwriter DV DeVincentis wrote while sharing a black-and-white photo of the actor.

“He would stop what was happening to point it out, compel you to pay attention,” DeVincentis recalled. “He would order you a must-have experience from a beloved menu and hold your eye as you paid attention to what was happening in your mouth. ‘Right, Guy? I mean… right?’ He would put an experience for you on the stereo, then start it over and play it again for you because we were talking over it the first time and ‘Pal, you really have to listen to it.’ “

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Actor Robin Tunney wrote, “I was so sad to hear about Rio passing. I remember him exiting his old yellow cab in late ’80s Chicago! The car was enormous but Rio could not be dwarfed by his impractical ride. He was too nice to be that handsome. Too cool to be that relatable. My Gosh that man was special. RIP Rio.”

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Hackford is the son of director Taylor Hackford and stepson of Helen Mirren. 

Taking to Instagram, Mirren shared a throwback photo in remembrance of the actor, writing, “El Rio.”