EXCLUSIVE: Maureen McCormick Is Ready for 'Dancing With the Stars' Despite Her Fear of Dancing in Public

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Maureen McCormick is headed to the dance floor of Dancing With the Stars despite her fear of dancing in public, and ET was first to join her in rehearsal on Thursday.

"You can conquer anything at any time in your life," McCormick told ET.

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The former Brady Bunch star will make her DWTS debut on Monday with pro partner Artem Chigvintsev. While she's not naturally drawn to dancing, she's bravely facing the competition at the insistence of her former TV mom, DWTS alum Florence Henderson.

"She was like, 'Mo, you have to do Dancing With the Stars,'" McCormick explained.

And apparently mom knows best, because she's having a ball! Plus, the iconic actress, who just turned 60 last month, is feeling better than ever thanks to a change in diet.

"I've had weight issues in the past," McCormick said. "I'm gluten free, and that took off weight immediately."

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McCormick can hardly go anywhere without hearing "Marcia, Marcia, Marcia!" but her 34-year-old DWTS partner admitted he never watched the show growing up in Russia.

"I haven't seen Brady Bunch at all, but week two, we're going to be doing something Brady Bunch," he teased.

Dancing With the Stars returns to ABC on Monday at 8 p.m. ET/PT.