Michelle ObamaMichelle ObamaMichelle Obama holds fitness 'bootcamps' for friends Obama marks Father’s Day: ‘I'm most proud to be Sasha and Malia's dad’ Obamas invited to be honorary football coach at University of Michigan MORE laughingly dismissed speculation that she could run on a two-woman ticket with Hillary ClintonHillary Rodham ClintonTrump notes 'election meddling by Russia' in tweet criticizing Obama Former Obama advisor calls Fox ‘state sanctioned media’ Biden rips Senate GOP healthcare bill, says it 'isn't about healthcare' MORE in 2016 during her appearance on the “Late Night Show with Jimmy Fallon” Friday night.

The popular first lady – two-thirds of Americans have a favorable view of her – is on a TV tour to promote the third anniversary of her “Let's Move” initiative to combat childhood obesity. She told the comedian that she has other ambitions than the presidency.

"You know, I have my eye actually on another job,” she told Fallon. “And I hear that when Jay Leno retires that 'The Tonight Show' position is going to open and I'm thinking about putting my hat in the ring.”

During the show, Obama also participated in a comic dance routine - “Evolution of Mom Dancing” - with Fallon, who was dressed as a woman.

The TV appearance is one of several planned over the next week, the Associated Press reports, including segments to run Tuesday on ABC's “Good Morning America” and Thursday on “The Dr. Oz Show.” She is scheduled to travel to Mississippi, Missouri and her home town of Chicago on a two-day tour starting next Wednesday.

Childhood obesity has more than doubled in children and tripled in adolescents in the past 30 years, according to the Centers for Disease Control and Prevention. In 2010, almost 18 percent of children between the ages of six and 11 were considered obese – up from 7 percent in 1980.