Alan Rusbridger, editor-in-chief of the Guardian for 20 years, is stepping down from the post during the summer.

alan rusbridgerHe will chair the Scott Trust, which owns the UK paper, taking over for Liz Forgan.

She praised Rusbridger as "the outstanding editor of his generation" who has fully embraced the digital age.

At the Trust, he would oversee the independent body that "guarantees the editorial integrity and commercial future of the Guardian," said Forgan.

The Guardian website attracted more than 110M unique visitors in October.

It won a Pulitzer Prize this year for reporting on the surveillance activities of the US government following the Edward Snowden leaks.

Rusbridger, who will soon turn 61, joined the Guardian in 1979 from the Cambridge Evening News.

He left for the TV critic job at the Observer and exited for the Washington editor post of the London Daily News.

Rusbridger returned to the Guardian to launch its weekend edition and features section before moving to the editor slot in 1995.

He is the 10th editor of the paper since its began in 1821 as the Manchester Guardian.