The hard-living screen star died at his home in the coastal Los Angeles suburb of Venice at 8:15 a.m. PDT, surrounded by family and friends, the friend, Alex Hitz, told Reuters.
In a wildly varied career spanning more than 50 years, Hopper appeared alongside his mentor James Dean in Rebel Without a Cause and Giant in the 1950s and played maniacs in such films as Apocalypse Now, Blue Velvet and Speed.
He received two Oscar nominations - for writing Easy Rider (with co-star Peter Fonda and Terry Southern), and for a rare heartwarming turn as an alcoholic high-school basketball coach in the 1986 drama Hoosiers.
"Easy Rider," regarded is one of the greatest films of American cinema, helped usher in a new era in which the old Hollywood guard was forced to cede power to young filmmakers such as Francis Ford Coppola and Martin Scorsese.
The low-budget blockbuster, originally conceived by Fonda, introduced mainstream moviegoers to pot-smoking, cocaine-dealing, long-haired bikers.
"We'd gone through the whole ‘60s and nobody had made a film about anybody smoking grass without going out and killing a bunch of nurses," Hopper told Entertainment Weekly in 2005. "I wanted Easy Rider'to be a time capsule for people about that period."
Hopper and Fonda were joined on screen by a then-unknown Jack Nicholson as an alcoholic lawyer, but it was not a harmonious set. Hopper clashed violently with everyone and Fonda later described him as a "little fascist freak." Their friendship was destroyed.
Hopper fell ill last September. He continued working almost to the very end, both on his cable TV series Crash and on a book showcasing his photography. But his final months were also consumed by a bitter divorce battle with his fifth wife, Victoria Duffy.
Indeed, his private life was never dull. His marriages included an eight-day union in 1970 with Michelle Phillips of the Mamas and Papas, who later told Vanity Fair that she was subjected to "excruciating" treatment.
The sun was out in force last sunday.....me, Johnny, Benny & PK went for a decent ride out...stopped at a few pubs, Beer was good, food was good, Company was excellent, The Bikes were great, The Brakes were shit..haha.........Days don't get better than this..
DIDN'T TAKE LONG TO SELL..........................
Not just ANY Triumph......oh no, this beauty belongs to Pete Stansfield....most of you who know your stuff will have seen this bike before, it's been in ALL the right mags......won trophies at shows.....and it's got some great history with it.....AND being a reversed head Motor just adds to the equation....Although don't bother doin' the sums...this bike is a friggin steal at £3500......want it?...go get it before someone else does!!! see Pete's blog HERE for more pics.....or Email him direct at firstname.lastname@example.org
He's a real nice guy........and he can even sort out the shipping for you...