US President Barack Obama is seen with host Jay Leno during a taping of 'The Tonight Show' at NBC studios in Burbank, California. Obama has appeared on the late night comedy shows before as a candidate, but NBC said this will be the first time a serving president has been on 'The Tonight Show.'    The long-running show, previously hosted by Johnny Carson, is an entertainment institution in the United States that features Leno's comedy routines, a live band and celebrity interviews. Getty Images logo Getty Images 8 months ago

US President Barack Obama is seen with host Jay Leno during a taping of 'The Tonight Show' at NBC studios in Burbank, California. Obama has appeared on the late night comedy shows before as a candidate, but NBC said this will be the first time a serving president has been on 'The Tonight Show.' The long-running show, previously hosted by Johnny Carson, is an entertainment institution in the United States that features Leno's comedy routines, a live band and celebrity interviews.