Edward Grim (died c. 1189) was a monk from Cambridge who visited Canterbury Cathedral on Tuesday 29 December 1170 when Thomas Becket was murdered.
Grim attempted to protect Becket from their attack until, his own arm being nearly cut off by a stroke aimed at the archbisop, he fell to the ground.
As it would seem that Grim did not meet Becket until a few days before the latter's death, his information concerning the archbishop's life must be considered second-hand apart from the last scenes to which he was an eye-witness.
A large part of his narrative closely resembles that of the French poet Garnier (or Guernes) de Pont-Sainte-Maxence, who completed his own work in 1175.
Grim was dead before Herbert of Bosham finished his work on St. Thomas, i.e. by 1186, or at latest 1189.