Amber Rudd was appointed secretary of state for work and pensions, the third minister to hold the role this year.
There was no direct announcement as of midday Friday, but Ms. Rudd was listed in the role on the Department for Work and Pensions' website.
Ms. Rudd replaces Esther McVey, who resigned Thursday following the announcement of the Brexit withdrawal draft agreement between the U.K. and European Union. Ms. McVey was appointed in January.
Ms. Rudd most recently was home secretary, a role she held between July 2016 and April 2018.
The secretary of state for work and pensions has overall responsibility for the Department of Work and Pensions.
Also on Friday, Stephen Barclay was listed as secretary of state for exiting the European Union, on the website for the Department for Exiting the European Union. Mr. Barclay was minister of state for the department of health and social care.
The Brexit minister role was held by Dominic Raab until Thursday, when he also resigned over the draft Brexit agreement. Mr. Raab was appointed this year following the resignation of David Davis, who was Brexit secretary since 2016.
The official Twitter account of Prime Minister Theresa May's office said the appointments of Ms. Rudd and Mr. Barclay had been approved by Queen Elizabeth II.
Spokesmen for the U.K. cabinet and the DWP could not be reached for comment.