Watch Barack Obama discuss birth certificate with Oprah Winfrey
Part of the interview (which will air in full on May 2), posted by ABC News, includes the president's further reactions on the "birther" debate.
"When it first came up, were you thinking, I hope I was born here?" Winfrey asks.
"Can I just say I was there, so I knew," Obama responds to the audience's amusement. "I knew I had been born. I remembered it."
Speaking more seriously though, the president explained why he decided to finally address the matter. "Two weeks ago a huge debate was initiated about where our budget needs to go," he says. "During the course of this major debate where I gave a big speech and the Republicans voted on their proposal, the biggest news was this birth certificate thing."
"We are living in a very serious time," he adds. "And America has huge potential and opportunity to seize the 21st century. We're only gonna get there, though, if we have a serious conversation about the things that matter to people."