Jon Stewart is entering the home stretch of his 16 years on Comedy Central's "The Daily Show"; he signs off for good on Aug. 6.

Stewart's exit, the latest in a year of upheaval in late-night TV, will be felt most acutely over the next 15 months as the U.S. approaches its first presidential election since 1996 without his comic take. Attesting to Stewart's cultural import, President Obama is booked for his seventh appearance Tuesday.

Stewart, who started on "The Daily Show" in 1999, cited restlessness in announcing his exit last February. During a recent appearance on "The Daily Show," film director Judd Apatow said he sensed that feeling even before the announcement when he interviewed Stewart by phone for a just-released book.

"I think it was that one moment when you were saying, 'I'm out of gas. What am I going to do?' " Apatow said to Stewart's laughter. Adam Lowitt, an executive producer on "The Daily Show," said he's had no sense his boss is second-guessing his decision. "Even around the office, he seems to be relishing the place that he's in right now and taking in every aspect of the show and the people that work there," Lowitt said. "He's aware that time is winding down. Regret is not there."

Miranda and Blake call it quits

Country music's top couple Blake Shelton and Miranda Lambert have announced their divorce after four years of marriage. "This is not the future we envisioned," the couple said in the statement. "And it is with heavy hearts that we move forward separately. We are real people, with real lives, with real families, friends and colleagues. Therefore, we kindly ask for privacy and compassion concerning this very personal matter." Lambert, a Grammy-winning native Texan, is one of country's music most lauded female singers who regularly dominated the Academy of Country Music's and Country Music Association's awards shows. Shelton became a ubiquitous star as he juggled his musical and TV career, as a judge on "The Voice" and a co-host of the ACMs. They married in 2011 in Texas and were seen together as recently as April at the ACMs in Texas.

lifetime of laughs: The Screen Actors Guild is recognizing Carol Burnett for her six decades in entertainment. The actors' union announced Monday that Burnett will receive its 52nd Lifetime Achievement Award at the annual SAG Awards in January. Burnett got her start on stage, where TV talent bookers spotted her. She joined the cast of "The Garry Moore Show" in 1959. She launched "The Carol Burnett Show" in 1967, which ran for 11 years and won 25 Emmy Awards.

Associated Press