By T. Rees Shapiro May 20 Follow @TReesShapiro. Alan Young, an Emmy Award-winning comic actor best remembered for playing Wilbur, the human sidekick and wonky owner of a talking horse in the 1960s television sitcom “Mister Ed,” died May 19 at the Motion Picture & Television Home in Woodland Hills, Calif. He was 96.
https://www.washingtonpost.com/entertainment/tv/alan-young-actor-who-played-wilbur-on-mister-ed-dies-at-96/2016/05/20/88ae8838-1ed4-11e6-8c7b-6931e66333e7_story.html
Burns is said to have told his staff: Get Alan Young. He looks like the kind of guy a horse would talk to.. Mister Ed, equine star of the television series poses with his TV co-star Alan Young on a beach in Malibu Credit: AP. The CBS show ran for six seasons (1961 to 1965) and Young played Wilbur Post, an amiable architect with a talking horse living in his backyard barn.
http://www.telegraph.co.uk/tv/2016/05/21/mister-ed-star-alan-young-friend-of-the-talking-horse-dies-aged/
Dear Cecil: I've just noticed a dumb new commercial with one redeeming feature: it heralds the return of Mr. Ed, the most debonair actor on four legs. Since I was a child, I've always wondered how they got that horse to talk.. Did they keep a camera trained on him until he yawned or something?
http://www.straightdope.com/columns/read/383/how-did-they-get-mr-ed-to-talk
The premise of the show was that Mister Ed would only talk directly to Alan Young as Wilbur Post, architect who set up his studio in the barn on his property so he could spend as much time as he could with his talking equine.
http://www.imdb.com/title/tt0054557/
Mister Ed is a horse who is owned by Wilbur Post. Mister Ed is not just any horse, he talks to Wilbur! But this gets Wilbur in all kinds of trouble because Mister Ed won't talk to anyone ... See full summary ».
http://www.imdb.com/title/tt0054557/
Cecil will have you know, Judy, that he has this one straight from the horse's … Lordy, for a second there I was about to commit a pun too horrible for words. Anyway, I did get this from the horse's buddy, namely the guy who played Wilbur Post, or, if you prefer, Wi-i-illllbu-u-urrrr, Ed's owner and putative master.
http://www.straightdope.com/columns/read/383/how-did-they-get-mr-ed-to-talk
Mister Ed is not just any horse, he talks to Wilbur! But this gets Wilbur in all kinds of trouble because Mister Ed won't talk to anyone else, so Carol, Wilbur's wife, thinks that Wilbur loves Mister Ed more then he loves her, because he spends so much time with Mister Ed.
http://www.imdb.com/title/tt0054557/
Though the wad of quasi peanut butter was harmless, Ed, being a horse (of course), naturally wanted to get rid of it, which he did by working his lips. When this was synched up with a voice-over by the inimitable Allan Rocky Lane, Ed looked like he was talking.
http://www.straightdope.com/columns/read/383/how-did-they-get-mr-ed-to-talk
For decades after the show ended, Young said he was often saddled with questions by fans about how the horse's lips were made to move to look like Mister Ed was talking. Young said the show's producers did not want the secret revealed, so he trotted out the rumour that peanut butter was put in the horse's mouth.
http://www.telegraph.co.uk/tv/2016/05/21/mister-ed-star-alan-young-friend-of-the-talking-horse-dies-aged/
Mister Ed star Alan Young, friend of the talking horse, dies aged 96. English-born actor-comedian Alan Young, who was the human sidekick of the talking horse in the Sixties sitcom Mister Ed, died on May 19, aged 96.
http://www.telegraph.co.uk/tv/2016/05/21/mister-ed-star-alan-young-friend-of-the-talking-horse-dies-aged/
who was the voice of mr ed the horse
Mr. Ed, the horse, was voiced by Allan Rocky Lane.  The voice of Mister ED was of Allan Rocky Lane.