Hailee Steinfeld has the Bills Mafia’s back.

While being interviewed for the February issue of “WhoWhatWear,” Steinfeld, the actress from “Sinners” and fiancée of Buffalo quarterback Josh Allen, made some sly remarks about the team’s AFC East competitors.

While taking the brand’s football IQ quiz, Steinfeld had to name the four teams in the AFC East division.

Pointing to her fingers, she quipped, “You got the Buffalo Bills and the Bills’ three sons,” in a jest aimed at the New York Jets, Miami Dolphins, and New England Patriots.

Steinfeld impressively tackled trivia questions about football, correctly stating that a roughing the passer penalty awards 15 yards and identifying the Super Bowl trophy as the Vince Lombardi trophy.

Steinfeld smiled and flipped her hair after she took the quiz.

Steinfeld recently joined Allen at the NFL Honors show when he was named the 2024 NFL MVP after he led Buffalo to a fifth straight AFC East title.

He threw for 3,731 yards, 28 TDs and had six picks for a 101.4 passer rating. He also ran for 531 yards and 12 scores.

Buffalo’s season ended with a 32-29 loss to the Chiefs in the AFC Championship game at Arrowhead Stadium on Jan. 26.

Elsewhere in the interview, the brunette beauty gushed over the couple’s engagement, which took place by the ocean in Malibu last November after roughly two years of dating.

Steinfeld recalled not knowing a thing leading up to the special moment.

“Oh my God, no! You talk to your girlfriends about that, right, where you’re like, ‘I just don’t want to know,’” Steinfeld said.

“I’m so grateful that he did it the way he did so that I looked good, and we have these photos that we’ll have and cherish for the rest of our lives that I’m not looking at being like, ‘What was I wearing?’” she said, adding that she “blacked out” in the moment.

“We were in Malibu, which is my happy place, and it was magical. That’s the word,” she recalled.

“I thought we were going on a little date night and it just so happened to be that the dress matched the flowers in this beautiful setup. I want to make a wallpaper out of this photo and put it in my room.”

Steinfeld and Allen were first photographed together in Manhattan in May 2023.

The couple share a home together in Buffalo.