Randy Fenoli says he can tell if a bride's entourage is going to be unsupportive as soon as he meets them

• Randy Fenoli has been working in the bridal industry for decades.
• The "Say Yes to the Dress" star told Insider the experience gives him insight into bridal appointments.

Randy Fenoli has been working in the bridal industry for nearly 30 years, and he became a household name through his role as fashion director at Kleinfeld Bridal, which is featured on "Say Yes to the Dress."

Fenoli's decades of experience have given him unique insight into what goes into choosing a wedding dress — including whether or not a bride has support as she picks out her dream gown.

Speaking to Insider about the 20th season of "Say Yes to the Dress," which is currently airing on TLC, Fenoli said he can tell instantly if a client's entourage will be supportive of her or not as she shops for a dress.

"When they come in, you can always tell what the mood is and whether they really love the bride and really just want her to find the dress of her dreams or whether they have their own agenda," Fenoli told Insider, adding that some guests might appear jealous or apathetic towards a bride.

"You never know what happened outside the salon doors before they walked in, but you can feel the energy as soon as they do," he said.

He also said it is sometimes his job to advocate for a bride when her family or friends aren't listening to her.

"I have to defend the bride sometimes. I say, 'Listen, if you guys don't get on board, I'm going to kick you overboard,'" Fenoli said.

"My goal is always to help the bride choose a dress that they feel the most beautiful in, because when they feel beautiful, they wear that dress like there is no other dress on the planet," he added.

"They know they look good, and everybody feels it," Fenoli said of how brides feel when they're wearing the right dress. "It's about the confidence that you have while wearing the dress."

Fenoli even advocates for brides who pick dresses he thinks are wrong for them, because he knows it's what they want.

"It is really tough, but if the bride's happy and she feels beautiful, that is what's most important," he said.

"That's when I have to really realize this dress makes her feel beautiful, so I can't change what she feels and I just have to let it go," Fenoli added. "But it's hard to sleep some nights."

You can watch new episodes of "Say Yes to the Dress" on TLC on Saturday at 8 p.m. ET.