The US President, Barack Obama turns 50 on Thursday, one of the youngest presidents -- only Theodore Roosevelt and John F. Kennedy were younger when they took office -- but the two and a half years in the Oval Office, with the world's most stressful job has taken its toll on Obama.
When Big 'O sworn in, he looked like the "guy from the Old Spice commercials." Now, he "look like Louis Gossett Sr," comedian Seth Meyers joked at the White House Correspondents' dinner. "If your hair gets any whiter, the Tea Party is going to endorse it," he added, quote from IBTimes.
The endless grind of the presidency, particularly given the ceaseless attacks he has endured from a Republican party determined to make him a one term president, have deepened some wrinkles and led some grey hairs to sprout.
Take a look at few photos of Obama's journey, from 2004 to present: