The Bachelor host Chris Harrison is dishing on the drama Hannah Brown causes when she visits Peter Weber on Season 24 and teasing the outcome of their steamy interaction.

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ABC released a The Bachelor promo last month that showed Hannah making a surprise visit to see Peter -- who finished in third place on her The Bachelorette edition -- while he was filming the show's 24th season, which is set to debut with a three-hour event on Monday, January 6 at 8PM ET/PT.

RELATED LINK: PETER WEBER'S 'THE BACHELOR' SEASON 24 CAST OF BACHELORETTES ANNOUNCED BY ABC (PHOTOS)

"I think you will see her make a pretty big impression on the show. Look, in all seriousness, her and Peter, they just have this thing -- that intangible kind of chemistry," Chris described in a recent interview with Entertainment Tonight.

"It's one of those things where no matter how much you think you're over somebody, when you see each other, it's a thing. It's still a thing."

Chris wouldn't give away what exactly happened between Hannah and Peter when they reunited, but he admitted their conversation wasn't exactly light and fluffy.

"It's not to say, look, is he over her [or] is she over him? I'm not going to get into that," Chris said.

"I'll let them deal with that on the show, but it's a thing -- and there is some serious chemistry between the two. It's just undeniable. And that's why we wanted to have her back on the show."

Chris said Hannah and Peter's exchange was "not just a, 'Hey I'm here to hit you on the shoulder and say good luck.' It's more than that."

When ET asked Chris if Hannah and Peter kissed during their reunion on The Bachelor, the franchise's longtime host dodged the question and replied, "It's more than just a, 'Hey buddy, good luck.'"

Chris also confirmed more happened than just a friendly handshake.

RELATED LINK: 'THE BACHELOR' FRANCHISE COUPLES NOW: WHO IS STILL TOGETHER?? (PHOTOS)

The Bachelor promo that had fans talking featured Hannah and Peter flirting and getting touchy-feely while sitting side-by-side on a sofa in a quiet room.
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"What are you doing here?" Peter asks Hannah in the clip, which aired on Dancing with the Stars' Season 28 finale after Hannah took the stage with her professional partner Alan Bersten.

"I'm making decisions for my heart, because I know there's still something there," Hannah replies. "And I would do anything for a relationship."

The pair's body language suggested there was potential for reconciliation, especially given Peter leaned in close to Hannah and nearly tried to kiss her.

Peter then apparently proceeded to invite Hannah to become one of his Season 24 bachelorettes.

"Hannah Brown, what I'm about to say is extremely crazy. What would you say if I asked you to come and be part of the house?" Peter asks Hannah as he rubs her back and she giggles.

Women were shown eavesdropping in on the conversation from a distance and yelling, "Oh my God!"

And in a second promo for the new The Bachelor season that aired later during the Dancing with the Stars broadcast -- which concluded with Hannah being crowned champion over three other finalists -- Hannah stepped out of a limo at the show's Malibu mansion.

RELATED LINK: 'THE BACHELOR' COUPLES NOW: WHO DID 'THE BACHELOR' STARS AND THEIR BACHELORETTE PICKS ACTUALLY END UP MARRYING? (PHOTOS) 

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According to Reality Steve spoiler blogger Steve Carbone, however, The Bachelor viewers shouldn't read into the promos too much.

"B4 everyone freaks out... Hannah WAS NOT a contestant on Peters season," Carbone tweeted late last month.

"She gets out of the limo to talk to him night 1 (didn't join the party), & shows up on a date in ep 3 again to talk," he continued. "Both were in LA. She just took a couple hrs off DWTS to do it."

Hannah admitted to People in July she was "in love with Peter" but her heart was pulling her in different directions on The Bachelorette's fifteenth season.

"But I had to make a decision," Hannah said at the time. "I felt like my heart was broken... What I'll miss most about Peter is his genuine love for me. The time we had together was real."

Hannah got engaged to aspiring country singer Jed Wyatt during The Bachelorette's Season 15 finale but she broke up with him five weeks after filming the marriage proposal due to his shady behavior and lies about his dating history prior to his appearance on the show.

Hannah playfully asked her runner-up, Tyler Cameron, out on a date during The Bachelorette's live reunion special since things didn't work out with Jed.

Hannah and Tyler spent one night together in Los Angeles, but then Tyler moved on with supermodels and social-media influencers.

For spoilers on Peter's journey to find his match and his Final 3 bachelorettes, click here. To read about unprecedented drama during a hometown date, click here.

Also click here for more spoilers that reveal how Peter's season will not have "a normal ending."

RELATED LINK: 'THE BACHELORETTE' COUPLES NOW: WHOM DID 'THE BACHELORETTE' STARS AND THEIR BACHELOR WINNERS ULTIMATELY END UP MARRYING?! (PHOTOS) 

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