Josh Allen’s younger sister, Makenna Allen, has made her stance on Taylor Swift clear: she’s a huge fan.

After her brother and the Bills faced off against the Kansas City Chiefs and Swift’s boyfriend Travis Kelce Sunday, Makenna opted to remain neutral amid the rivalry.

Makenna came out in support of Swift with pictures of her and friends attending one of the 14-time Grammy winner’s ‘Eras Tour’ shows last Friday in Toronto.

She also added multiple snaps from Sunday’s showdown at Highmark in the reel, including one featuring the Allen matriarch, Lavonne, in Bills’ signature blue and red.

‘From Taylor Swift on Friday to a Bills win on Sunday — This weekend hit all the right notes! #GoBills,’ Makenna wrote in the caption.

Makenna’s support of Swift comes after the wife of one of her brother’s teammates took aim at the songstress.

Bills linebacker Baylon Spector’s wife Ryleigh said she was ‘never a Swiftie’ after Buffalo ended the Chiefs perfect season with a 30-21 win.

‘9-2!’ Ryleigh wrote on Instagram, referencing Buffalo’s impressive record. ‘Never a Swiftie.’

Ryleigh’s Instagram post included a phot of herself alongside Ryan Bass, the wife of Bills kicker Tyler Bass and daughter former NFL punter Rick Tuten, as well as Brianna Pomerleau, the wife of Buffalo tight end Dalton Knox.

The three Bills WAGs are seen smiling in the photo as the team improved to 4-4 against Kansas City in the Josh Allen era, although not everyone was so pleased. The admission that someone isn’t a fan of Swift amid her year-long romance with Kelce was simply too much for some to handle.

‘If it wasn’t for Low Class…She would have NO CLASS,’ one Swiftie wrote online. ‘Do better.’

One woman wrote that ‘the jealousy always shows up,’ while another wrote that Ryleigh is ‘never classy either.’

‘Yeah nobody cares if those three show up at a Bills game or not!’ one fan added. ‘They are irrelevant.’

Swift entering the NFL realm is over a year in the making, since her relationship with Kansas City tight end Travis Kelce publicly began last September.

Swift herself was not at the mega-AFC matchup on Sunday to support her boyfriend.

Swift has been to Highmark Stadium one before, during last season’s AFC Divisional round matchup between the teams.

That day, where she met Jason and Kylie Kelce for the first time, the Chiefs ended the Bills postseason dreams for the third time in four seasons.

There is understandable bad blood between Buffalo and Kansas City after their postseason clashes over the last few years.

Yet, it has been the Bills who have won the last three regular-season matchups between the teams.

The two best teams in the AFC could be on a collision course for another playoff classic in several weeks.