In celebration of the LEGO Harry Potter video game, go behind the scenes with the Harry Potter cast over the years to see some of their most memorable moments in this video, Fun on the Set of Harry Potter.

Our top five favorite moments from this video...
1- Emma Watson caught on the phone while on her bed on the set... just like she was at home! (At 0:17)
2- Daniel Radcliffe goofing off and hitting a rock on accident... and saying "Ouch." (At 0:35)
3- Little Dan up to no good and saying, "You saw nothing!" (At 1:12)
4- Adorable little Rupert Grint whispering to Emma and Daniel while they giggle. (At 1:23)
5- Rob Pattinson as Cedric Diggory dancing with Katie Leung as Cho Chang in the background! (At 2:52)

Check out the video below: