Michelle Obama says the US president has quit smoking.
The first lady says her husband has not smoked in almost a year. She said it is a personal challenge for him and she is very proud.
Mrs Obama made the comments in an interview with reporters at the White House yesterday, adding that the president had always wanted to quit.
The president himself has discussed his struggles with nicotine addiction, acknowledging in June 2009 that he still sneaked the occasional puff. The White House last addressed the topic in December, when Press Secretary Robert Gibbs said he hadn't seen Obama smoke in nine months but stopped short of asserting that he had quit.