It's after the resignation of Edouard Philippe who has been in the post for three years.
Mr Castex, 55, is relatively unknown in France, although he is a senior civil servant.
The new Prime Minister has been a key player in the government's response to the Covid-19 pandemic.
Israel's parliament sworn in as Eisenkot tries to forge a government
Israel's parliament was sworn in on Tuesday without a new government, after a deadlocked general election stripped Prime Minister Benjamin Netanyahu of his parliamentary majority but left his main rivals with no clear path to power.
Defiant Hegseth blasts impeachment effort ahead of House vote
Defence Secretary Pete Hegseth on Tuesday blasted efforts to impeach him as a farce that would embolden US adversaries, as he lashed out at his political opponents in Congress and the media in an unapologetic defence of his record.
Saudi official inspects Aramco Riyadh office after Houthi attack
Saudi Arabia's deputy governor of Riyadh inspected an Aramco administrative building in the capital that was damaged in an attack by Houthis, state news agency SPA reported early on Tuesday.
Three workers die at Tata's India iPhone parts factory in latest safety incident
Three contract workers have died at a Tata Electronics factory that makes parts for Apple iPhones in India's southern Tamil Nadu state, the latest supply chain incident affecting the US company in its most critical manufacturing base after China.
Sweet Disposition
The Temper Trap
Nothing Compares To You
Sinead O'connor
The Monster
Eminem & Rihanna
1:00am - 6:30am
6:30am - 11:00am
33°C
32°C
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Morena Baccarin Talks New Season of 'Sheriff Country', Short Film & More!
The Saturday Brunch Episode 19: Comedy, Music & Festival Season
Thursday 29 Nov - Weekend vibes are here EARLY!!
