McKelvey has become something of a celebrity since he raced through the pain barrier to finish second in the John Smith's Grand National last April.
Horse lovers have been able to monitor the nine-year-old's road to recovery and full fitness for a second attempt at the world's greatest steeplechase on BBC1's 'The One Show'.
The programme, which goes out at 7pm Monday to Friday, occasionally shows a 'stable-cam' that gives access to the horse 24 hours a day as well as being available on the channel's website.
This fascinating and unprecedented insight was given with trainer Peter Bowen's blessing.
"They just asked us if we would do it and we said OK," said the hard-working Bowen, whose stables are at Haverfordwest in Pembrokeshire.
Thousands of racegoers and millions of television viewers will have witnessed McKelvey finish with a flourish on the long run-in from the final fence to take second place, just three-quarters of a length behind the winner Silver Birch.
He went lame in the last 100 yards, otherwise it could have been a different story. And later that the full extent of McKelvey's bravery emerged.
"It was a good performance last year. He jumped very well and he was a bit unlucky really because he sustained the injury," said his jockey Tom O'Brien.
"When I pulled up I realised there was something wrong."
It was discovered McKelvey had damaged a tendon, an injury that requires patience both from the horse and his carers.
Thankfully, McKelvey was the ideal patient and he is now the unlikely TV star.
All roads lead back to Aintree as McKelvey bids to complete his recovery by going one better.
"He's fine, no problems," said Bowen.
"It was a bit of blow at the time and it was a slow job, but that's over now."
Although McKelvey had recovered by mid-July, Bowen was in no hurry to push him back into action.
The campaign revolves solely round the Grand National, with Bowen leaving no stone unturned in the pursuit of glory.
To preserve McKelvey's handicap mark, Bowen decided from the outset not to run him over fences before Aintree and give him just two races over hurdles.
"The plan always was just to have the two quiet runs over hurdles," said Bowen.
The trainer is likely to be mob-handed in the National - he did after all make 11 entries - but it will be McKelvey that all eyes will be focussed on.
And O'Brien is hoping he can go one better this time round.
"His preparation has gone OK this year. He's been disappointing in two hurdle runs, but I hope he's on good form on the day. I'll give it a go," he added.
And after last season's near-miss it would be fitting if McKelvey were to put the record straight and reward the faith of his patient connections, not to mention his faithful television audience!
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