| Tournament information | |
|---|---|
| Dates | 21 December 1977 |
| Venue | Wembley Conference Centre |
| City | London |
| Country | England |
| Format | Non-ranking event |
| Total prize fund | £4,350 |
| Winner's share | £2,000 |
| Highest break |  Ray Reardon (WAL) 77 |
| Final | |
| Champion |  Patsy Fagan (IRL) |
| Runner-up |  Alex Higgins (NIR) |
| Score | 4–2 |
The 1977 Dry Blackthorn Cup was a professional invitational snooker tournament on 21 December 1977. Created by promoter Mike Barrett, it was played at the Wembley Conference Centre in London and featured four professional players. The participants included three players who between them had won each edition of the World Snooker Championship since 1969: John Spencer (1969, 1971, 1977), Ray Reardon (1970, 1973, 1974, 1975, 1976) and Alex Higgins (1972). The fourth player was Patsy Fagan, who had won the 1977 UK Championship earlier in the month.
The event attracted around 1,500 spectators and was televised, with a forty-minute programme on ITV being broadcast on Christmas Eve, 24 December 1977. Fagan won the tournament by defeating Higgins by 4 frames to 2 in the final. Reardon made the highest break of the competition, 77.