Beyonce's Mother Denies Pregnancy Rumor

Tina Knowles, left, and Beyonce Knowles attend the unveiling of the Beyonce Cosmetology Center on March 5, 2010, in New York. Jason Kempin/Getty Images

NEW YORK (CBS) Tina Knowles is setting the record straight: daughter Beyonce isn't pregnant - at least, not yet.

After the rumor mill circulated again Wednesday that the singer and rapper husband Jay-Z were expecting, Knowles spoke to Ellen DeGeneres to clear things up.

Pictures: Beyonce
Pictures: Jay-Z
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"The truth is that's it's not Beyonce that's pregnant. It's me," Knowles said with a smile in an interview on "The Ellen DeGeneres Show" airing Thursday.

She then added, "I'm kidding y'all. I'm 56. No, no, it's not true [about Beyonce]. Not right now."

Knowles added that she's learned not to pay much attention to the speculation about her daughter. ""With all the rumors, by now I should have five or six grandchildren," she said.

But she added that when it does happen, she'll be thrilled.

"I'm looking forward to it," she said.