Stephen Hawking
It's not the first time the pair have clashed either.
'I hope to inspire people around the world to look up at the stars and not down at their feet.'
'Tell Gordon Ramsey how to make a Shepherd's pie whilst you're at it.'
He doesn't mince his words.
Not everyone wants one.
'I can't believe Stephen Hawking got to meet Eric Monkman.'
It's the world-famous physicist's 'ultimate ambition'.
He also demanded a top Trump cabinet member resign.
'I think he should step down for the sake of the party.'