Sam Maydew, manager of the 73-year-old actor, confirmed Hopper is recovering after visiting a NYC hospital after developing stomach ailments that usually accompany the flu.
"After experiencing some severe flu-like symptoms and not being in his hometown, Dennis went to the hospital for medical care," Maydew said in statement to Access Hollywood. "He was treated for dehydration and is now back in his hotel room and feeling much better. Dennis would like to thank everyone for their well wishes and he looks forward to getting back to work on 'Crash.'"
On Wednesday, a source told Access Hollywood that Hopper began feeling ill just before he was due to make a series of promotional appearances for the second season of his Starz television show, "Crash."
Hopper was at MSNBC's "Morning Joe" show early Wednesday when some type of illness seemed to set in. Hopper left before he had a chance to appear on air. His absence was explained on the program.
Hopper also canceled on several other NBC appearances including "Today" and "Late Night With Jimmy Fallon."
The iconic actor has starred in countless films during his lengthy career, including "Speed" with a young Sandra Bullock and the legendary "Easy Rider" with Jack Nicholson and Peter Fonda.
He is currently starring in "Crash" on the Starz network alongside Eric Roberts and Jennifer Love Hewitt's ex-fiancee, Ross McCall.
Last week, it was announced that Hopper is set to star with Scott Caan, former "Battlestar Galactica" star Tricia Helfer and J.K. Simmons, who played Ellen Page's father in "Juno," in the film "A Beginner's Guide To Endings."
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PLAY IT NOW: Dennis Hopper Raves About 'E-Ring' & Lifelong Passion For Photography (May 16, 2005)
PLAY IT NOW: 2009 CineVegas Awards