Paul Webster has said he is “honoured” to be appointed editor of The Observer.
Mr Webster, the current deputy editor of the paper, will succeed John Mulholland, who is taking up a new role as editor of Guardian US in April.
The appointment comes as the paper switches to a new tabloid format this weekend.
Mr Webster said: “I am absolutely committed to the progressive and liberal principles that The Observer represents, and to the high standards of journalism that my predecessors have achieved.
“We have a brilliant group of reporters, critics, commentators, and editors, as well as a loyal but demanding readership. I look forward to working with my colleagues to develop the new Observer as it faces up to the huge challenges of the era.”
Guardian News and Media (GNM) editor-in-chief Katharine Viner said she was “delighted” Mr Webster would be taking up the role.
“He has great experience, judgment and understanding of The Observer's place in British public life and will be a superb editor for the world's oldest Sunday newspaper,” she said.
The Guardian downsized from its mid-size Berliner format, and replaced its well-known blue and white masthead with simple black lettering on Monday.
The new look is part of a three-year plan aiming to ensure GNM breaks even by 2019.
PA
