The famous Beatles' song played as Ivanka Trump took the stage, minutes before she introduced her father and newly-minted Republican presidential nominee, Donald Trump, in the convention's final night in Cleveland.
"The unauthorized use of 'Here Comes the Sun' at the [convention] is offensive and against the wishes of the George Harrison estate," the estate's official Twitter account said.
"If it had been 'Beware of Darkness,' we might have approved it!" the estate quipped in a follow-up Tweet.
The Trump campaign has had a turbulent history with musicians who have denounced the use of their songs during his campaign events.