Vice President Biden added to his lengthy list of gaffes Wednesday when he took a moment to honor the memory of the Irish prime minister's mother -- a woman who's very much alive.

"God rest her soul," Biden said as he introduced Brian Cowen and President Obama at a St. Patrick's Day celebration at the White House Wednesday.

The vice president was quick to correct the mistake, noting that it's Cowen's father who is no longer living.

"Wait ... your mom’s still, your mom is still alive. It was your Dad (who) passed. God bless her soul. I gotta get this straight," Biden said.

After citing the Irish proverb that "a silent mouth is sweet to hear," he then yielded the podium to Obama.

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