Bachelor in Paradise's fifth season began filming in Mexico last week, and spoilers have already begun to leak out.

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[Bachelor in Paradise Spoilers Warning: Please stop reading now if you want to remain in the dark about Bachelor in Paradise's Season 5 cast (which includes some of Becca Kufrin's still-airing The Bachelorette bachelors) and their love interests]

While the original cast for Bachelor in Paradise's new season has yet to be officially announced by ABC, Reality Steve spoiler blogger Steve Carbone has released the identities of many of the bachelors and bachelorettes who may appear on the season, as well as some date details.

Two notable people who will be definitely be appearing on Paradise this summer are Colton Underwood from Becca Kufrin's currently-airing season of The Bachelorette and Tia Booth from Arie Luyendyk Jr.'s edition of The Bachelor, Carbone reported.

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Fans have yet to see Becca eliminate Colton on The Bachelorette's fourteenth season, but Carbone previously reported Tia will show up before the Rose Ceremony in which Becca will determine her Final 3 bachelors to admit she still has feelings for Colton.

Becca allegedly eliminates Colton when she determines her Final 3 bachelors, and then -- no surprise here -- both Colton and Tia were flown to Mexico for Bachelor in Paradise 5.

On June 7, Carbone tweeted several photos of Colton lounging by a pool in Mexico with a female producer nearby.

"Colton hanging in Puerto Vallarta ready for Tia...errr...filming of Bachelor in Paradise. Or both," Carbone captioned the images.

Colton and Tia briefly dated before Arie's season of The Bachelor aired on ABC earlier this year, so the fling took place several months before Colton began dating Becca on The Bachelorette.

Colton and Tia have both said the timing wasn't right for them to begin a relationship given Colton was going through The Bachelorette's casting process.

When the pair were reunited on a group date with Becca present, Tia also assured Becca that Colton is a great guy and all they did was kiss.

On June 12, Carbone tweeted that both Colton and Tia were on the set of Paradise together.

RELATED LINK: 'THE BACHELORETTE' SPOILERS: WHO DOES BECCA KUFRIN PICK AS HER WINNER? WHO ARE HER FINAL 4 BACHELORS AND RUNNER-UP?

"[The Bachelorette is] absolutely setting up a Tia/Colton relationship for BIP. 'The timing wasn't right,' yet they'll be single on a beach in Mexico in close quarters, so now the timing will be right," Carbone wrote in his blog.

"I'd honestly be stunned if Tia and Colton don't get engaged at the end of BIP. "

He added, "At the least, they leave Mexico as a couple. It's like producers knew where this was headed all along and that's why we saw what we did last night, and then with Tia's reappearance right before the Final 4 Rose Ceremony to tell Becca she still has feelings for him. Too good of a narrative for them to pass up."

And then on Thursday, Carbone revealed on Twitter eyewitnesses spotted Tia and Colton on a double date with Season 4 Bachelor in Paradise couple Raven Gates and Adam Gottschalk.

Raven and Tia also happen to be good friends given their shared Arkansas roots.

Spectator photos were captured from the double date show Tia and Colton sitting on a bench together, as well as Raven and Adam dancing together.

"You'll never guess in a million years who was on a date today in Paradise. Time's up. It was Colton & Tia," Carbone tweeted June 14.

"And Raven & Adam were there w/ them. It was a game musical chairs and then the girls split off from the guys to talk. Told you this was coming."

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In addition to Tia and Colton, Carbone believes the following bachelors and bachelorettes will most likely appear on Bachelor in Paradise this summer: David Ravitz, Jordan Kimball, Connor Obrochta, Eric Bigger, Jacqueline Trumbull, Kenny King, Kendall Long, Bekah Martinez, Caroline Lunny, Krystal Nielson, Chelsea Roy, Bibiana Julian, Jenna Cooper, Olivia Goethals, Clay Harbor, Chris Randone, Leo Dottavio, and Joe Amabile.

David, Jordan, Connor, Clay, Chris, Leo, and Joe are all from Becca's season of The Bachelorette. Eric and Kenny previously competed for Rachel Lindsay's heart on Season 13 of The Bachelorette last year.

And Jacqueline, Kendall, Bekah, Caroline, Krystal, Chelsea, Bibiana, Jenna, and Olivia were all bachelorettes with Tia on Arie's The Bachelor edition. (Bibiana also competed on The Bachelor Winter Games spinoff).

The Bachelor's Season 20 star, Ben Higgins. will also reportedly make an appearance on Bachelor in Paradise 5, although Carbone insisted he will not be a contestant. It's possible Ben will hand out a Date Card or take on some other role.

As for other couples potentially brewing in Mexico right now, Carbone reported Jacqueline and Kenny went on a dinner date together this past weekend.

In addition, Kendall and Leo were reportedly talking in the real world -- as they both live in Los Angeles -- before leaving to tape Bachelor in Paradise, so Carbone predicted those two will hook up right away.

Some international cast members may also participate in Paradise this season, including Yuki Kimura from The Bachelor Winter Games. However, Carbone isn't sure whether she'll be an actual bachelorette given she can barely speak English.

Becca's The Bachelorette season currently airs Monday nights at 8PM ET/PT on ABC. The only guys she has already eliminated so far who are rumored to be part of the Bachelor in Paradise cast are Clay and Joe.

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