Sarah Jessica Parker (WENN.COM file photo)

Sarah Jessica Parker was left red-faced during a TV interview on Tuesday night when she accidentally referred to her husband Matthew Broderick as "average".

The Sex and the City star was discussing how quickly the couple's son, James Wilkie, was growing up during an appearance on The Late Show with David Letterman, admitting he is mature for his age.

She said, "(James Wilkie) is, for the moment, more on the diminutive side. Some might call it a Napoleon complex, it (his age) gives him some (confidence) because he is so mature. He's a brainiac... well I think so, naturally."

But Parker found herself desperately trying to backtrack when she began to compare the seven-year-old's size to that of his actor father Broderick.

She added, "(James Wilkie is) not quite tiny - that's on my husband's side - well, actually Matthew is average... not in personality or in intellect.... no, no, no, no, no!

"Let me clear this up. For the record, not in personality, intellect, charisma, talent, genuine likeability, well the list could go on and on. Anyway he's average in height as I understand, so the odds of our son being average in height and weight is perhaps promising."