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.
Iranian foreign minister heads to Russia, Trump says 'call us' to negotiate
US President Donald Trump said Iran could telephone if it wants to negotiate an end to their two-month war, as Tehran's foreign minister landed in Russia on Monday to seek support from President Vladimir Putin.
Israeli strikes kill 14 in Lebanon as residents are warned to leave towns beyond 'buffer zone'
Israeli strikes have killed 14 people and wounded 37 on Sunday, Lebanon's health ministry said, as the Israeli military warned residents to leave seven towns beyond the "buffer zone" it occupied before a ceasefire that has failed to fully halt hostilities.
Trump says Iran 'can call', as Iranian FM returns to Pakistan
President Donald Trump said on Sunday that Iran could call if it wanted to negotiate an end to the war launched by the US and Israel, as Iran's foreign minister returned to Pakistan for talks despite the absence of US counterparts.
Mali defence minister killed in major weekend assault
Mali Defence Minister Sadio Camara has been killed in an attack on his residence, the government said on Sunday, a high-profile fatality during coordinated assaults staged the previous day by fighters, including the West Africa al Qaeda affiliate.
Ukraine marks 40th anniversary of Chernobyl disaster
Ukraine commemorated the 40th anniversary of the Chernobyl disaster on Sunday, amid fears that Russia's four-year war could spark a repeat of the world's worst nuclear accident that led to thousands of deaths and devastating environmental consequences.
10:00am - 1:00pm
Broadcasting every weekday, Georgia Tolley goes beyond the headlines to speak to government ministers, decision makers, analysts and local experts to find out how the news will impact those of us living in the UAE.
1:00pm - 4:00pm
Every weekday afternoon, Helen Farmer will help you to navigate the highs and lows of life in the UAE. Stay up to date with what’s happening and where to go.
UAE President Sheikh Mohamed Bin Zayed Al Nahyan’s visit to the US to boost economic and technology ties including AI.
Apple Inc. shares fell Monday after a closely followed analyst warned that demand for the firm’s new iPhone 16 Pro model has been lower than expected. Is this a sign that the AI software just isn’t ready?
Does working from home kill productivity or can it benefit staff by giving them more flexibility and a better work/life balance?
Dubai’s current population is more than double compared to almost twenty years ago, which now stands at 3.7 million. Lots of families are also moving to the UAE now. So what does it mean for the property market?
Glory Ehirim Nkiruka is Noon’s first ever female delivery driver. In her first ever interview, she explained why she loves her job, despite the heat!
