Bethenny Frankel showed off more than her baby bump while walking down the runway Thursday night.

The Real Housewives of New York City star, 39, accidentally revealed her mic pack!

The Skinny Girl guru -- who is more than five months pregnant with her first child with fiance Jason Hoppy -- looked stunning in her Isabella Oliver frock at the Red Dress Collection show at New York Fashion Week as she walked out to the song, "Baby Love."

But after a few nervous steps, she noticed that her dress was riding up to reveal a black mic pack strapped to her right thigh. She stopped and pulled her dress down before continuing. (Watch clip above.)

On her walk back, the star shimmied down to playfully adjust her dress once more.

The Red Dress runway show also featured Kim Kardashian, Heidi Klum, Felicity Huffman and Kimora Lee Simmons.