Kyle Fairlie

as Oscar

as Spaceboy (voice)

as Spaceboy / Young Dad (voice)

as Felix King (voice) (1 episode)

as Cub

as Burton Hilburn (Age 11)

as Rabbit (voice)

as Young Arthur / Alexander

as Bully #2

as Little Dad (voice) (1 episode), as Little Percy (voice) (1 episode), as Space Boy (voice) (9 episodes), as Young Dad (voice) (1 episode)

as Max

as Rabbit (voice) (130 episodes)

as William

as Michael Webster (6 years old)

as Michael at 6 (1 episode)

as Kid on Santa's Lap

as Alexander (voice) (13 episodes)