Retired supermodel Tyra Banks left fans stunned on her TV talk show yesterday when she revealed a baby bump.

The former Victoria's Secret stunner pretended she had a secret of her own when she greeted her studio audience with a blanket wrapped around her, pretending she was cold.

Banks then talked about recent magazine speculation suggesting she had gained weight, and then said, "I have to come clean to you guys... I have been gaining weight - and this is why."

Banks then let the blanket fall to the ground to reveal a baby bump and, as the audience gasped, she yelled, "I'm pregnant."

But the model quickly explained, "This is just a suit, there's no baby in here... I'm not pregnant. One day I will be."

The ruse was planned to promote a show dedicated to the latest baby gifts.