The two have come head to head on social media.
Ryanair CEO Michael O'Leary is expected to address his ongoing spat with Elon Musk later.
The airline boss recently hit out at the X owner in a row over Wifi on aeroplanes.
Musk has floated the idea of buying the company while Ryanair responded online by dedicating it's "Big Idiot Seat Sale" to the billionaire.
Mr O'Leary has called a press conference for this morning where he's promised to address Musk's latest "latest Twitshit".
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