Harry:
When you were both 23
Ron:
When you were 25 and he was 26
Hermione :
When you were 23 and she was 24
Draco:
When you were both 21
Fred:
When he was 26 and you were 24
George:
When you were 21 and he was 23
Seamus:
When you were both 19
Ginny:
When you were both 27