Peter, 31, and Kelley, 30 -- who broke up in February 2021 -- sparked rumors their romance may be back on in August 2022 when Peter had left a flirty comment on Kelley's Instagram account and the pair had been spotted together in public on multiple occasions, including this past weekend.
According to a source, Peter and Kelley have "rekindled their romance this summer and have been spending a lot of time together since then," Us Weeklyreported. "[They are] full-on back together."
Peter has reportedly been "planning fun dates" with Kelley and the lovebirds are having "a lot of fun together" since reconnecting.
"Peter wants to be in a serious committed relationship and his feelings for Kelley never went away," the source said, adding, "They're both happy and looking forward to where things go this time around."
Peter and Kelley also just attended The Bachelorette alum Tyler Cameron's gala for the Andrea Cameron Foundation in honor of Tyler's deceased mother last week.
While Kelley noted it wasn't "one specific thing" that led to their demise, she told Mike Johnson and Bryan Abasolo on the "Talking It Out with Bachelor Nation" podcast, "I think it was just a lot of little things. You know what? Peter and I had a lot of fun, but I don't know if, like, I looked up to him in a way that I wanted to look up to my spouse."
Kelley elaborated on how she has that type of admiration for her brothers and her father.
"If I'm in a moment where I need some sound advice and I'm like, 'Okay, who can I go to advise me on this super important decision of my life?' Peter was just, like, fun and games," Kelley explained.
"I could go with him and have fun, but I just think I want more of a man that I look up to."
Peter and Kelley briefly met at a wedding venue before The Bachelor's 24th season began airing, so they wondered if their relationship was destined, but Kelley ended up placing fifth on Peter's season because she had trouble opening up and being herself on-camera.
Peter proposed marriage to model Hannah Ann Sluss during his The Bachelor finale, but he broke up with her while his season was airing in January 2020.
However, Peter and Madison's revived romance never really got off the ground when they talked about getting back together on his March 2020 After the Final Rose special. (Madison is now engaged to a man outside of Bachelor Nation named Grant Troutt, a speaker and aspiring pastor).
After eight months of dating, Kelley and Peter announced their split on New Year's Eve 2021.
However, the pair briefly reconciled and gave their relationship another shot, until Kelley and Peter's romance ended for good around Valentine's Day in February of last year.
Kelley said on the "Chicks in the Office" podcast in May 2021 that her relationship with Peter ended "really badly" and she had told Peter to "get out of my life and lose my number" when they split.
Kelley also insisted she'd "just run" from the children's book author -- whom she claimed has childlike-hobbies such as collecting Pokemon cards and playing video games -- if she ever bumped into him in the streets of New York.
Things turned nasty when Peter addressed Kelley's biting remarks during a May 2021 episode of his "Bachelors in the City" podcast, telling his listeners that Kelley seemed to be riding the fame wave and trying to push headlines with her "calculated and disingenuous" statements.