Friends and family of Sir David Frost gathered at his funeral to pay tribute to the broadcaster.
Sir David died earlier this month of a heart attack, aged 74, while on the Queen Elizabeth cruise ship where he was giving a speech.
Campbell said it had been a "wonderful send off". Writing on Twitter, he said: "Wife Carina and three sons all spoke and the love shone through."
Fry wrote: "David Frost's funeral - so sad. He was a wonderful father, husband and friend. The only people who didn't like him hadn't met him."
Known for his incisive interviews - above all with disgraced US president Richard Nixon - Sir David spent more than 50 years as a television star.
His award-winning interview style was considered non-aggressive, affable and effusive - but he had a talent for extracting intriguing information and revealing reactions from his subjects.
During his series of five interviews with Nixon in 1977, the notoriously slippery former president known as "Tricky Dicky" dramatically admitted that he had "let down the country".
Sir David's big break came during the 1960s' satire boom when he co-created and hosted That Was The Week That Was.