Three weeks ago, former president Bill Clinton underwent lifesaving quadruple bypass surgery. Recently, we spotted the ex-commander-in-chieflooking slim and trim as he walked into a neighborhood pharmacy near his home in Chappaqua, New York, to pick up some medicine before being whisked away by the secret service.

TV producer Linda Bloodworth-Thomason is a Clinton insider and has been in close contact with the former president since his surgery. "He said it only hurts if he laughs, breathes or talks," Bloodworth-Thomason joked. "He just sounds very tired; and I think this is a long-awaited rest, which he would have given himself it if he hadn't had to, but we're glad he's getting it."

Clinton has been recuperating at his home in upstate New York, and the owner of one of the president's favorite restaurants, the Chappaqua Restaurant & Café, has spotted him several times since his surgery. "He's always handsome, but he looked a little tired and a little thin," she told us.

Clinton is sticking to a strict diet now. He reportedly went into a grocery store and bought a carton of low-fat ice cream, and he's been spotted doing a lot of power walking.

One neighbor saw Clinton and his wife, Hillary, marching right by his home. "He looks good," the neighbor said. "He looked tired, but he was about three-quarters of a mile from his house."

From the looks of things, Clinton is well on his way to recovery.

For more on Bill Clinton, including the first pictures taken of the former president since his surgery, tune into Friday's edition of "Extra."