Travis Kelce’s ex-girlfriend is sending Taylor Swift a stark warning.

Amid the stars’ budding romance, Maya Benberry claimed “the man that [she] knew him to be when [they] dated” is an unfaithful one.

“Taylor seems like such a fun girl with a beautiful spirit, so I wish her the best of luck, but I wouldn’t be a girls’ girl if I didn’t advise her to be smart!” Benberry, 31, told DailyMail.com Tuesday — even though she recently “liked” a comment calling the pop star a “5.”

“I’m sure by now she has mastered the ability to see who is really there for her — and who is just using her.”

The marketing and brand consulting expert — who dated the Kansas City Chiefs player for a few months in 2016 after winning his E! reality dating show, “Catching Kelce” — hopes Swift “comes out the teacher in this situation and not the student.”

“Only time will tell,” she went on, “but like the saying always goes: Once a cheater, always a cheater.”

Though Benberry did not elaborate on her claims during the interview, she previously seemed to accuse Kelce, 33, of cheating on her with his next girlfriend, Kayla Nicole.

“When you and your ex broke up five months ago but you find out via social media that he’s supposedly been in another relationship for 6…” she wrote in a since-deleted tweet.

The two-time Super Bowl champion went on to date Nicole, 31, on and off from 2017 to 2022. Though he never publicly addressed Benberry’s allegations, he did deny being unfaithful to the sports broadcaster after a brief split in 2020.

“This is fake news… a lie… and not why Kayla and I broke up… take all your hatred somewhere else please,” he insisted at the time.

Meanwhile, an insider tells Page Six exclusively that Kelce and Benberry “weren’t even together long enough for him to cheat on her.”

“They dated literally less than three months, and they were contractually obligated to not announce their breakup,” the source explains, saying Benberry was “just the winner of the show.”

“So when she says, ‘Once a cheater, always a cheater,’ she doesn’t even know what she’s talking about. This is very much a 15-minutes-of-fame type of a moment for her.”

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Our informant makes sure to add that Kelce has “been in other very public relationships after that where no one else has said that he’s cheated.”

Reps for the athlete as well as Nicole did not immediately respond to our requests for comment.

Out of the 50 women from all 50 states who were vying for Kelce’s heart during the first and only season of his reality dating program, he chose Benberry from Kentucky — even though he had his doubts.

“I love your confidence, but at times, it does get overconfident,” the tight end told her at the time, according to the US Sun.

“It kind of shows arrogance. I have been attracted to women like that my entire life, and those relationships didn’t work because of that.”

Reports that Kelce and Swift, 33, were “hanging out” began to surface earlier this month after he tried — and failed — to give her his phone number via a friendship bracelet at the Kansas City stop of her Eras Tour in July.

The pair appeared to confirm their romance this weekend after the Grammy winner was seen attending his football game alongside his mom and later getting “very affectionate” with him at the team’s afterparty.