Parliament speaker Marzouk Al Ghanem says he had received an official letter informing him that all 15 ministers had tendered their resignations.
All ministers in the Kuwaiti government submitted their resignations on Monday, the government spokesman said, after media reports of an imminent reshuffle.
“All the ministers have submitted their resignations to the prime minister to enable him to prepare for the requirements for the next stage,” said State Minister for Cabinet Affairs Shaikh Mohammed Abdullah Al Sabah, the government spokesman.
“The prime minister decided to refer the issue to the Amir to take whatever steps necessary to serve national interests,” said Shaikh Mohammed, cited by the official Kuna news agency.
Earlier, parliament speaker Marzouk Al Ghanem said he had received an official letter informing him that all 15 ministers had tendered their resignations.
The speaker also said the government would not participate in a parliament session scheduled for Tuesday, which has now been called off.
Kuwaiti media reported last week that Prime Minister Shaikh Jaber Mubarak Al Sabah was preparing a major reshuffle.
The ministerial resignations came almost at the same time as the constitutional court rejected two petitions to nullify July parliamentary polls and dissolve the five-month-old assembly.
The ruling, which cannot be challenged, means that the current parliament may become the first since 2003 to complete a full four-year term.
The cabinet was formed in early August following a snap parliamentary election called after the constitutional court nullified a previous poll and scrapped parliament on procedural grounds.
Some ministers had come under fire from MPs, who filed nearly a dozen requests to grill members of the government, including the prime minister.