article_snippet: Viewers have lamented the end of Jon Stewart 16-year stint on Tonight Show .
article_snippet: The 31-year-old South African comedian (pictured in 2012) has been named successor to Stewart, 52, who will step down from The 31-year-old South African comedian (pictured in 2012) role on Tonight Show this year .
article_snippet: Although no dates have been disclosed, Stewart will likely depart by the end of the year.