It is the first time Team GB’s trio have advanced to the men’s 1,500m final since 1984.
Wightman looked excellent to win the first semi-final in 3:33.48 ahead of the USA’s Cole Hocker and gold medal favourite from Kenya Timothy Cheruiyot.
While the second semi-final was won in an Olympic record by Kenya’s Abel Kipsang in 3:31.65, with Norway’s Jakob Ingebrigtsen (3:32.13) second and Kerr third (3:32.18).
While Heyward (3:32.82) claimed a PB after making a late surge to take sixth and qualify as one of the two fastest athletes not inside the top five.
Defending champion from Rio 2016 Matt Centrowitz exited, finishing ninth, despite a season’s best of 3:33.69.
Join our new commenting forum
Join thought-provoking conversations, follow other Independent readers and see their replies