Courtesy of the Martha Stewart Show

Last week, famed fashion designer Oscar de la Renta taped a wedding-themed episode of "The Martha Stewart Show," and StyleList was there to soak up all of his worldly wisdom about impending nuptials, including this sparkling tidbit:

"Don't bring your mother when you're picking out your wedding dress," he stated. "She has different ideas than you do of what you should look like."

"The worst day of my life was when Alexis wore a gray flannel suit to get married," noted a commiserating Stewart.

The episode, which airs Jan. 20 at 10 a.m. on the Hallmark Channel (and encores at 2 p.m. and the next day at 1 p.m.), includes a mini fashion show featuring the designer's decadent bridal gowns.

De la Renta offered his personal insights for each of the fanciful frocks, including a dress with draped bodice and full skirt with vertical ruffles. "This has been a best-seller for years," he said. Meanwhile a strapless dress with an ostrich-feather skirt was created to "move and look like a cloud," he shared with StyleList.

He also showed a subtle, almost Wedgwood-blue dress with embroidered carnations and silver beading.

"Something old, something new, something borrowed, something blue," he told StyleList with a shrug. "A lot of brides now want to get married in a traditional dress, but in a color. The white dress is a 19th-century, late-Victorian virginal thing. It's new. Prior to that, brides got married in all kinds of colors. There was no such a thing as having to get married in white."

He admitted he gets a good amount of color requests, but red is the most common. "I have made unbelievably beautiful red dresses. There is a very beautiful movie actress named Silvana Mangano, and her daughter wore one. My wife's sister, when she got married at a beautiful fishing camp in Canada, wore a red dress.

He continued: "It's the most special day in the life of a woman, and I think you should wear what your heart calls for. After all, red is a color that we identify with our heart. The organ that our love comes from," said the charmer.

StyleList spoke to de la Renta while he was waiting in his green room and multitasking. "With my iPad, I've been looking at clothes," he shared, for his upcoming Fall 2011 collection. While his assistants work in Italy on the samples, "they can send pictures and I can correct them," he said, showing us a muslin of a wrap dress and a draped blue tweed dress. "I can do a lot of my work without leaving the city."

You can see these fab wedding frocks for yourself when the "Martha Stewart" wedding show airs Jan. 20 on the Hallmark Channel. Again, that's at 10 a.m. with encores the same day at 2 p.m. and the next day at 1 p.m.

Check out the latest movements of our favorite bride-to-be.