Mark Hamill wished John Williams a happy 90th birthday!

John Williams is the composer behind many famous movie soundtracks.

Among them is the “Star Wars” film franchise, in which Hamill starred.

“Dear John Williams: [cake-emoji],” Hamill tweeted.

“It is simply impossible to underestimate your contribution to the success of the #StarWars films,” he tweeted.

“#ThankYou_YaBigHunkaGenius,” he added alongside a prayer-hands emoji.

The post got over 27,000 likes in only a few hours!

Many fans also hopped on social media to wish him a happy 90th birthday as well!

“Motion picture music, in general, is the baby of John Williams,” one user joked.