EXCLUSIVE: Tish and Brandi Cyrus Talk How They Would Help Design Miley and Liam Hemsworth's Future Wedding

They also confirm she's not married yet!

It doesn’t hurt to have two interior designers in the family when you’re planning a wedding! Miley Cyrus’ mom, Tish Cyrus, and sister, Brandi Cyrus, are about to go head-to-head on their new home makeover show, Cyrus vs. Cyrus: Design and Conquer.

So would they be willing to lend their expertise to planning Miley’s future wedding to longtime fiancé, Liam Hemsworth?

WATCH: Is Miley Cyrus Secretly Married to Liam Hemsworth? Dad Billy Ray Sparks Rumors With Pic of Her in a White Dress

“Whether I would have done the show or not, I would have always been working on [Miley’s] house or her wedding...or whatever it may be, for all my kids,” proud mom Tish told ET’s Carly Steel. “I'm definitely, I'm in there, my kids are everything to me, you know, so no matter what they do I'm there.”

As for the rumors that Miley and Liam have already tied the knot thanks to one cryptic Instagram post from dad, Billy Ray, Tish and Brandi insist that Miley is not married just yet.

“I'm always the last to know,” Tish said of the headline-making post. “I looked at the picture, and I'm like, Brandi was like, 'Why was everybody thinking that?!'”

Miley’s older sister added, “I was like in that top?! What are you, crazy?!

“If Miley was getting married, it would not be in that dress!” Tish agreed.

“She would have had some fabulous wedding dress, not just like frilly top she was wearing in a photo,” Brandi added.

Married or not, Miley is very vocal about her support for both her mom and sister as they tackle this new project.

“It's my passion, and it’s funny cause even Miley said this morning, she goes, 'Mama I'm so excited for you because you've given us an outlet to show the world our art, our music and our things and now you're getting to do that for yourself,'” Tish said.

But neither Miley nor Billy Ray is willing to take sides once the competition starts.

WATCH: EXCLUSIVE: Noah Cyrus Shuts Down Miley Cyrus and Liam Hemsworth Wedding Rumors: 'She's Not Married'

“They're just both supportive of both of us. Like it's so hard for them to say they like one or the other, they're all just kind of in shock that...they are like, 'Wow you guys are really great at this,'” Tish said.

For more from the Cyrus family, watch the clip below!