Washington: America's first black President Barack Obama, who will turn 50 this Thursday, has said that even though he has got "a little greyer", his wife Michelle thinks he is still "cute".

"I've got a little greyer since I took this job, but otherwise, I feel pretty good," an online quoted President Obama.

He added that his wife, Michelle, has told him that she still thinks "I'm cute". "And I guess that's, that's all that matters, isn't?" he said.

Obama was born in 1961 near the end of the baby boom years of 1946-1964. He'll join the more than 4.5 million other boomers who are turning 50 this year, according to latest US Census figures.

The grey hair around President Obama's temples is about the only obvious sign of ageing.

He says his daughters "Malia and Sasha say it makes me look distinguished. Michelle says it makes me look old". The US First Lady also talks about seeing the "worry creasing his face", the President said.

The over six foot tall President is as lanky as he was when he took office. He has gained no noticeable amount of weight despite a level of job stress that would send most people to the refrigerator for relief on a nightly basis.

He has stuck to a regimen of near daily exercise that includes treadmill runs, weightlifting and weekend games of pickup basketball, golf or substitute coaching daughter Sasha's basketball team.