Tributes pour in for race legend.
The now-retired Pulborough trainer formed a formidable partnership with Starkey in the late 1970s and early 1980s.
They won a host of big races both at home and abroad with legends of the turf that included the great Dancing Brave, Ela-Mana-Mou, Kalaglow, Lear Fan, Rousillon, Recitation and Sadeem.
Harwood and Starkey enjoyed Classic success in the 2000 Guineas with To-Agori-Mou in 1981 and Dancing Brave five years later.
''I best remember Greville for his dedication, hard work and being a really great jockey, even more as a stable jockey,'' said Harwood.
''He was a trainer's dream in so many ways that he was such a good judge of every horse he rode and that makes a trainer's life ever so much easier.
''He was a great character, he was full of life and a great party man,'' Harwood told At The Races.
Starkey won a total of five British Classics, the others coming on Homeward Bound in 1964 and Fair Salinia (1978).
He also landed a shock victory on the German-trained Star Appeal in the 1975 Prix de l'Arc de Triomphe.
Newmarket trainer Michael Jarvis recalled the days Starkey rode for him.
"He rode quite a few winners for me and I remember one of the first he rode for me was So Blessed, who was fourth in the 2000 Guineas" he told At The Races.
"Greville was a super horseman.
"He could handle difficult horses, he had beautiful hands and we'll miss him very much," he said.