In tonight's premiere of I Am Cait, the 65-year-old gives Kim Kardashian a tour of her new closet and growing wardrobe.
"I love this Tom Ford dress," Caitlyn says as she pulls the high-end garment out.
"Mum has that," Kim quickly blurts out.
"What's that?" Caitlyn asks.
"Mum has that," she repeats before Caitlyn hilariously shrugs in disbelief. "So it will be like a ‘Who Wore It Better?'"
"Who wore it best!" Caitlyn exclaims with a giant smile.
"She has it in chocolate brown," Kim adds.
"We gotta do that," Cait laughs. "Wouldn't that be the funniest thing ever?"
"You should just come over at a time when I know she's there and I'll just pick out an outfit for her to wear and I'll say, ‘Oh my god, I'm gonna take you to dinner. You should wear this.' And you'll stop by," Kim plots.
"And we'll both have the same outfit," Caitlyn adds. "That is funny. I better wear it before she does!" Watch the hilarious clip for yourself!
I Am Cait is Express from the U.S. tonight at 9.30 p.m., only on E!