Jennifer Lopez took Alex Rodriguez to a strip club to research 'Hustlers'

Jennifer Lopez was serious about researching her latest role.

In a recent interview with Vulture, Lorene Scafaria -- the writer-director of the Lopez-led flick, Hustlers -- reveals that the 49-year-old entertainer went to great lengths to study her character, a scamming stripper named Ramona, so much so that she got her fiancé, Alex Rodriguez, involved.

"She and Alex went and visited a strip club, and she was able to give me some… insights," Scafaria tells the outlet with a laugh.

Additionally, Lopez worked hard to get in even better shape for the role as she learned how to pole dance.

"She’s obviously such an unbelievable dancer, but she trained so hard-core for this," Scafaria says. "Pole dancing is not like anything else. It required muscles you don’t know you have. So we did treat it a little bit like a sports movie in that way."

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Jennifer Lopez with Alex Rodriguez and daughters on set of Hustlers
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Jennifer Lopez with Alex Rodriguez and daughters on set of Hustlers
WEST NYACK, NY - MARCH 26: Alex Rodriguez and Jennifer Lopez leave the set of 'Hustlers' at Palisades Center on March 26, 2019 in West Nyack, New York. (Photo by James Devaney/GC Images)
NEW YORK, NY - MARCH 26: Alex Rodriguez and Jennifer Lopez on set of 'Hustlers' on March 26, 2019 in New York City. (Photo by Adrian Edwards/GC Images)
WEST NYACK, NY - MARCH 26: Alex Rodriguez and Jennifer Lopez leave the set of 'Hustlers' at Palisades Center on March 26, 2019 in West Nyack, New York. (Photo by James Devaney/GC Images)
NEW YORK, NY - MARCH 26: Alex Rodriguez on set of 'Hustlers' on March 26, 2019 in New York City. (Photo by Adrian Edwards/GC Images)
WEST NYACK, NY - MARCH 26: Jennifer Lopez seen filming on location for 'Hustlers' at Palisades Center on March 26, 2019 in West Nyack, New York. (Photo by James Devaney/GC Images)
WEST NYACK, NY - MARCH 26: Alex Rodriguez seen on the set of 'Hustlers' at Palisades Center on March 26, 2019 in West Nyack, New York. (Photo by James Devaney/GC Images)
NEW YORK, NEW YORK - MARCH 26: Jennifer Lopez gets a visit from Alex Rodriguez and her family while Jennifer is busy filming 'Hustlers' on March 26, 2019 in New York City. (Photo by Say Cheese!/GC Images)
WEST NYACK, NY - MARCH 26: Jennifer Lopez seen filming on location for 'Hustlers' at Palisades Center on March 26, 2019 in West Nyack, New York. (Photo by James Devaney/GC Images)
WEST NYACK, NY - MARCH 26: Jennifer Lopez seen filming on location for 'Hustlers' at Palisades Center on March 26, 2019 in West Nyack, New York. (Photo by James Devaney/GC Images)
WEST NYACK, NY - MARCH 26: Jennifer Lopez and Constance Wu (L) seen filming on location for 'Hustlers' at Palisades Center on March 26, 2019 in West Nyack, New York. (Photo by James Devaney/GC Images)
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When ET caught up with Lopez at the New York City stop of her It's My Party Tour, the "El Anillo" singer called pole dancing "probably one of the most challenging things I've ever done for a film."

"My arm is still recovering and my back. So yeah, I would say that was the hardest thing I ever did, but it was worth it," Lopez told ET. "I love this character. I love this story. It's a really gritty New York story [with] women at the forefront... To be able to produce it and star in it was very special."

In the Vulture article, Scafaria also discusses casting the film, which became "infinitely easier" after landing Lopez as the leading lady.

"The moment I finished the script, I realized, 'Oh my God, Ramona is Jennifer Lopez. Jennifer Lopez is Ramona. The two of them are the same; they have all of these similar qualities. It has to be her,'" Scafaria says. "... Everybody really, really, really wanted to work with Jennifer. That was the beauty of making this movie, too: casting what felt like the right people for each part, and watching them interact the way that they should with each other."

22 PHOTOS
Jennifer Lopez with Alex Rodriguez and their kids
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Jennifer Lopez with Alex Rodriguez and their kids
As the sun sets on 2018, from our family to yours ... #HappyNewYear everyone! 🎊🍾🎉
LAS VEGAS, NV - SEPTEMBER 30: Alex Rodriguez, Planet Hollywood headliner Jennifer Lopez and family on the red carpet following the finale performance of Lopez's record-breaking residency, 'JENNIFER LOPEZ: ALL I HAVE' on September 30, 2018 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images for Caesars Entertainment)
Great time at the Laker game with the kiddies last night!!! Thank you @gunnarfitness @lakers @magicjohnson
Posse out — so long, Idaho.
NEW YORK, NY - SEPTEMBER 26: Singer Jennifer Lopez and daughter Emme and Alex Rodriguez and Maximilian Muniz are see outside ABC Kitchen on September 26, 2017 in New York City. (Photo by Raymond Hall/GC Images)
💙🌺🌸🌼🌈🌟☀️🌛🌎
Morning school run... #happykidshappyfamily❤️
♥️
💙
This... 💞
NEW YORK, NY - AUGUST 20: Jennifer Lopez, with daughter Emme, and Alex Rodriguez inside the 2018 MTV Video Music Awards at Radio City Music Hall on August 20, 2018 in New York City. (Photo by Kevin Mazur/WireImage)
Me and my three favorite girls #Emme #Ella #Tashi🌸🌸🌸
Bring your kids to work Day! #betterlatethannever #shadesofblue #backatit #workingmamalife
Sunday funday w the girls!!! 🌸👛👗👒
Macha 13, I can’t believe it’s been two years. Only 730 days, which have flown by, but it feels like we have been together forever. We are meant to be, and how much you mean to me cannot be put into words. . From baseball games, to traveling across the world to shows in Vegas. We have done it all together and every moment with you is cherished. Where this road will take us next is unknown but there is no one else I would rather have by my side. The journey is just beginning and I am excited for what’s ahead. . Macha, your hard work is unmatched. Your relentless drive and determination push me to be a better man each and every day. . Like you there is none other. Words will never do justice to what the last two years have meant to me. Thank you for always being you, for your unwavering support and unconditional love.❤️ . Te amo mucho, Lola. . - Macho 13 @jlo
The best times are with these lil ones... 🙏🏼🌟 #ilovechristmastime #familia
About last night... Perfect way to start the year... Love that they still wanna fall asleep in Mama’s arms ♥️♥️🙏🏼
When we were kids, birthdays were exciting because it was all about the gifts we would be getting. A new bat, dance shoes, maybe a new CD (yes I’m old!). I see firsthand how that’s changed for Jennifer, and how she’s found joy in sharing with others. For someone who has been about giving everything she has 365 days a year—to our children, our families, the world—I hope today, we can give you all the happiness you deserve. I love you mucho Macha 13. ❤️
AROD GS25. LIMITED EDITION. Only 696 made. Link in bio.
My girls ❤️
Sugar and spice and everything nice... 💕🌸 #E&E #thankheavenforlittlegirls
Today has an entirely different meaning to me than I did when I first became a father to Tashi and then my Ella Bella. It’s an incredible responsibility, and one I have always treasured. But as I grow older and proudly watch them doing the same, not only are my kids my pride and joy and number one priority - now they also motivate me. Every day, Tashi and Ella make me a better dad and a better person. Being a father is the greatest job in the world, more than any career I could have dreamed of as a kid. To all the fathers out there, never stop trying to be the best. I don’t. #HappyFathersDay
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Hustlers, which dropped its first trailer on Wednesday, ended up with quite the cast of incredible talent including Cardi B, Lili Reinhart, Lizzo, Keke Palmer, Constance Wu, Trace Lysette and Mette Towley.

"I chased Lizzo for a year," Scafaria says. "I met with Trace Lysette probably a year earlier, then wrote her a part. I knew I needed Keke Palmer so early on. I remember casting the Mercedes character and saying, ‘It has to be Keke Palmer.’ Jacqueline Francis, who goes by Jacq the Stripper on Instagram, was somebody I knew I wanted to write a part for as well. Mette Towley was someone I’d met with probably two years earlier."

As for Cardi, it took two years of chasing her down through Instagram DM's to get the 26-year-old rapper and former stripper signed on to the project. The chasing worked, as Cardi told ET in May that she simply "had to be in this movie."

"This movie is something I can relate [to]... All the actress in the movie I can tell them, like, 'No, no, no. This is how it goes,'" Cardi told ET's Katie Krause. "... The club that the movie is based on that's... the first type of club that I worked in... This was my life."

All the work paid off with a cast who generally got along and liked each other.

"Constance and Jennifer love each other. There was this very beautiful sister relationship that was unfolding. And Keke and Lili together, they’re so adorable. Trace and Mette really hit it off," Scafaria tells Vulture. "I always feel like mom. I’m like, ‘They don’t have to love mom; they just have to love each other. We had a pretty remarkable time together; it was an incredible bond for something that was shot in 29 days with 15 women."

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Constance Wu on the red carpet
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Constance Wu on the red carpet
LOS ANGELES, CA - OCTOBER 09: Constance Wu attends the 2018 American Music Awards at Microsoft Theater on October 9, 2018 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
HOLLYWOOD, CA - AUGUST 07: Constance Wu arrives to the Los Angeles premiere of Warner Bros. Pictures' 'Crazy Rich Asians' held at TCL Chinese Theatre IMAX on August 7, 2018 in Hollywood, California. (Photo by Michael Tran/FilmMagic)
HOLLYWOOD, CA - AUGUST 07: Actress Constance Wu arrives at the Warner Bros. Pictures' 'Crazy Rich Asians' premiere at the TCL Chinese Theatre IMAX on August 7, 2018 in Hollywood, California. (Photo by Amanda Edwards/WireImage)
HOLLYWOOD, CA - AUGUST 07: Actor Henry Golding and actress Constance Wu arrive for Warner Bros. Pictures' 'Crazy Rich Asians' Premiere held at TCL Chinese Theatre IMAX on August 7, 2018 in Hollywood, California. (Photo by Albert L. Ortega/Getty Images)
HOLLYWOOD, CA - AUGUST 07: Actor Constance Wu arrives at Warner Bros. Pictures' 'Crazy Rich Asians' Premiere at TCL Chinese Theatre IMAX on August 7, 2018 in Hollywood, California. (Photo by Emma McIntyre/Getty Images)
LOS ANGELES, CA - SEPTEMBER 18: Constance Wu attends 68th Annual Primetime Emmy Awards at Microsoft Theater on September 18, 2016 in Los Angeles, California. (Photo by Michael Kovac/Getty Images for AXN)
BEVERLY HILLS, CA - MARCH 04: Actress Constance Wu attends the 2018 Vanity Fair Oscar Party hosted by Radhika Jones at Wallis Annenberg Center for the Performing Arts on March 4, 2018 in Beverly Hills, California. (Photo by Taylor Hill/FilmMagic)
BEVERLY HILLS, CA - MARCH 04: Constance Wu attends the 2018 Vanity Fair Oscar Party hosted by Radhika Jones at Wallis Annenberg Center for the Performing Arts on March 4, 2018 in Beverly Hills, California. (Photo by Dia Dipasupil/Getty Images)
SANTA MONICA, CA - DECEMBER 11: Actress Constance Wu arrives at The 22nd Annual Critics' Choice Awards at Barker Hangar on December 11, 2016 in Santa Monica, California. (Photo by Allen Berezovsky/Getty Images for Fashion Media)
LOS ANGELES, CA - FEBRUARY 26: Actress Constance Wu arrives at the premiere of Disney's 'A Wrinkle In Time' at El Capitan Theatre on February 26, 2018 in Los Angeles, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
SANTA MONICA, CA - JANUARY 11: Actor Constance Wu attends The 23rd Annual Critics' Choice Awards at Barker Hangar on January 11, 2018 in Santa Monica, California. (Photo by Jon Kopaloff/FilmMagic)
LOS ANGELES, CA - JANUARY 07: Actor Constance Wu attends HBO's Official Golden Globe Awards After Party at Circa 55 Restaurant on January 7, 2018 in Los Angeles, California. (Photo by Frederick M. Brown/Getty Images)
WESTWOOD, CA - SEPTEMBER 16: Actress Constance Wu attends the premiere of 'The LEGO Ninjago Movie' at Regency Village Theatre on September 16, 2017 in Westwood, California. (Photo by Jason LaVeris/FilmMagic)
FRESH OFF THE BOAT - ABC's 'Fresh Off the Boat' stars Constance Wu as Jessica Huang. (Bob D'Amico/ABC via Getty Images)
BEVERLY HILLS, CA - AUGUST 06: Actress Constance Wu attends the Disney ABC Television Group TCA summer press tour at The Beverly Hilton Hotel on August 6, 2017 in Beverly Hills, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES, CA - JANUARY 10: Actress Constance Wu attends the premiere of 'The Book of Love' at The Grove on January 10, 2017 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES, CA - JANUARY 08: Actress Constance Wu arrives at HBO's Official Golden Globe Awards after party at the Circa 55 Restaurant on January 8, 2017 in Los Angeles, California. (Photo by David Livingston/Getty Images)
LOS ANGELES, CA - NOVEMBER 14: Actress Constance Wu arrives at the Glamour Women Of The Year 2016 at NeueHouse Hollywood on November 14, 2016 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
LOS ANGELES, CA - NOVEMBER 14: Actress Constance Wu attends Glamour Women Of The Year 2016 at NeueHouse Hollywood on November 14, 2016 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images)
LOS ANGELES, CA - SEPTEMBER 17: Constance Wu attends the 70th Emmy Awards at Microsoft Theater on September 17, 2018 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)
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That bond is something Lopez also felt on the set of the film.

"I just felt like Cardi was such a natural choice, much like the other girls, Constance and Lili Reinhart, Keke... Lizzo and everybody," Lopez told ET. "We needed that cast of characters to kind of make that come to life. We needed that kind of personality from the girls, because the story really called for it. These were a special little group of women."

Hustlers hits theaters on Sept. 13.

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