Board Thread:Spoilers!/@comment-26198810-20150818214311/@comment-25926288-20150819181838

LinusHikaru wrote: They have also cast Ehrem Kassam as young Sir Kay for The Broken Kingdom (5x04)

Young Arthur, Guinevere and Kay: http://tinyurl.com/o5jkstk I guess the others are future knights tooo...or just his friends.