President Obama turns 52 today.
Last week, while he was on Capitol Hill meeting with congressional Democrats to discuss issues including immigration reform and the federal debt, House Minority Leader Nancy Pelosi presented him with a dark-chocolate cake inscribed, "Happy Birthday Mr. President."
During his four and a half years in office, the president has aged visibly. Use the slider below to compare pictures of Obama in 2009 and December 2012, or click here to see how other presidents have aged while in office.
Past presidential birthdays have often been celebrated with great fanfare -- from Jennifer Hudson performing at a party for Obama to George H.W. Bush skydiving and John F. Kennedy being serenaded by Marilyn Monroe.