John McDonald, head of local production at MediaWorks TV, referred to Ewen as "mischievous, intelligent and warm-hearted".
"He set the standard for many of our young comedians to aspire to, with a knack for telling a wonderful, crazy, circular story that had fantastic gags all the way round. He'll be hugely missed."
Ewen performed in post-quake Christchurch, where comedy played an important part in helping Cantabrians through tough times. He won the Billy T Award in 1997 and the Decade Achievement Award from the NZ Comedy Guild in 2010. Recently, he presented the TV3 show Road Madness and appeared as a panelist on 7 Days.
Ewen was highly regarded as an ambassador for children's charity Variety NZ and he received a Variety International Presidential Citation.
I have caught Ewen's gigs a few times over the years. He always made me laugh and truly was "the V8 of NZ comedy".
Fellow comedians took to Twitter to post tributes.
Mike King: "I still remember our first gig together in 1994. Man was too funny. Gone too soon, rest easy brother."
Rhys Darby: "Just heard the incredibly sad news that my friend, the veteran legend Kiwi comic Ewen Gilmour, had passed away."
Te Radar: "It's a dark day out west. Thanks for the good times, Ewen. You brought so much joy to so many people."