Media playback is unsupported on your device Media caption Jon Stewart announced he was looking forward to having "dinner on a school night with my family", who he had heard were lovely people

Jon Stewart, the host of Comedy Central's The Daily Show, will step down later this year.

The comedian said it had "been an absolute privilege" to have been at the helm of the satirical show since 1999.

He will leave later this year. "This show doesn't deserve an even slightly restless host and neither do you," Stewart told his audience on Tuesday.

Comedy Central president Michele Ganeless paid tribute, saying: "His comedic brilliance is second to none."

Stewart's show has often been cited as a leading news source for young people, with an average audience of one million viewers.

Media playback is unsupported on your device Media caption There was humour when President Obama appeared on The Daily Show in 2012, but also serious questions about the Benghazi attack on US diplomats

His targets - and his guests - have been politicians and public figures, addressed in tones that are often indignant, or teasing.

The Daily Show has also been a launch pad for several well-known comic performers, including Steve Carell and John Oliver, as well as Stephen Colbert.

"I don't think I'm going to miss being on television every day," Stewart said. "I'm going to miss coming here every day. I love the people here. They're creative and collaborative and kind.

"It's been the honour of my professional life, and I thank you for watching it, for hate-watching it, whatever reason you are tuning in for."

The host said he was not sure exactly when he would leave, or what he would do next.

In 2013, he took time out to direct a film, Rosewater, about an Iranian-born journalist who was imprisoned and accused of spying.

"I don't have any specific plans," he said. "Got a lot of ideas, got a lot of things in my head. I'm going to have dinner on a school night with my family, who I have heard from multiple sources are lovely people."

Image copyright Getty Images Image caption The Daily Show has won 20 Emmy Awards

Analysis: Nick Bryant, New York correspondent

A late-night satirist who fused pop culture and politics, Jon Stewart has come to enjoy much the same status among younger viewers that anchors like Walter Cronkite achieved in the eyes of their grandparents.

Like the evening news shows of yore, The Daily Show has become appointment viewing, though many people catch it afterwards online, where Stewart's riffs often become viral sensations and also enjoy a long afterlife.

Part of his appeal has come from launching stinging critiques about the sensationalist tendencies of modern-day American TV news, with the cable networks Fox News and CNN among his favourite targets.

A much-quoted online poll once showed that 44% of respondents looked upon him as the best source for trustworthy news.

Comedy Central has not said who will replace Stewart. Time Magazine urged the network: "After so many years of men hosting late-night shows, a woman at the helm is long overdue."

Stewart's departure comes after the network lost Colbert, another major comedy figure, who left to take over David Letterman's late night show on CBS.

In a statement, Ms Ganeless said: "Through his unique voice and vision, The Daily Show has become a cultural touchstone for millions of fans and an unparalleled platform for political comedy that will endure for years to come.

"Jon will remain at the helm of The Daily Show until later this year. He is a comic genius, generous with his time and talent, and will always be a part of the Comedy Central family."

Famous fans react on Twitter

Image copyright Twitter

Actor Hugh Laurie: "Devastated that Jon Stewart is standing down. The thin comic line is breached and the barbarians are upon us."

Author JK Rowling: "Jon Stewart is leaving @theDailyShow, one of my favourite TV programmes ever. That's major news to get over your morning tea. #BritishGrief"

US comedian Patton Oswalt: "So, we have to navigate the poop-dipped train wreck of the 2016 election WITHOUT Jon Stewart hosting @TheDailyShow? Hmmm…"

Broadcaster Ryan Seacrest: "Jon Stewart, thanks for all you've done to make us think, learn, and laugh."

Former Late Late Show host Craig Ferguson: "Congratulations to Jon Stewart on an extraordinary groundbreaking run."

Ex-newspaper editor and CNN host Piers Morgan: "Jon Stewart quitting? Good timing. He was beginning to be eclipsed by John Oliver. This way, he can leave on a high."

Asked about the show by The Hollywood Reporter last year, Stewart said: "Like anything else, you do it long enough, you will take it for granted, or there will be aspects of it that are grinding.

"I can't say that following the news cycle as closely as we do and trying to convert that into something either joyful or important to us doesn't have its fraught moments."

In an interview with US broadcaster NPR in November, he admitted he had considered leaving The Daily Show.

"You can't just stay in the same place because it feels like you've built a nice house there, and that's really the thing I struggle with," he said.

"It is unclear to me. The minute I say I am not going to do it any more, I will miss it like crazy."