Mark Hamill took to Twitter yesterday to share his praise for John Williams, a sentiment he’s shared before. The tweet came in response to video of a child playing Darth Vader’s theme on the trombone.

“I’ve said it before & I’ll say it again: After George Lucas, no one is more responsible for the success of #StarWars than John Williams,” Hamill wrote and added “#GenialGenius”.

We agree with Mark, but we’d add Ralph McQuarrie, Alan Ladd Jr. and Gary Kurtz to the of those responsible for the success of Star Wars, alongside George Lucas and John Williams.