How can you find out who played a character on the night you saw the musical?

I saw Billy Elliot in Victoria Palace, London on the 8th of June 2009,

i loved it SO much but i don't know which boy played BILLY!

the options are: Ollie Gardner, Tom Holland, Fox Jackson- Keen, Tanner Pflueger or Brad Wilson.



i've seen their pictures next to their names but i can't figure it out? how can i find out?How can you find out who played a character on the night you saw the musical?
GO ONLINE and search for the name.

Or if you got a copy of like a paper packet than look in there

smokey bones

andys auto sport