Joe Jonas reveals what Sophie Turner and Priyanka Chopra call themselves: 'They've gotten really close' (Exclusive)

Joe and Nick Jonas have "what [all] brothers want": Their significant others are friends!

On the heels of Nick's wedding to Priyanka Chopra, Joe opened up to AOL's Gibson Johns at the kickoff for JCPenney's Giving Spree about the relationship between Priyanka and his fiancée, Sophie Turner.

"They’ve gotten really close, and it’s really cool to see their friendship grow," he told us. "They were friends before we even met. Sophie shot ‘X-Men’ on the same lot that [Priyanka] shot ‘Quantico’ for a while, so they would spend a lot of time together, which made it even more special once Nick and Pri obviously got together. It’s cool."

The two actresses get along so well, even, that they've given themselves a nickname since they began dating the famous brothers.

"They’re calling themselves the 'J-Sisters,'" Joe revealed. "They have this camaraderie now that they feel is not only friendship, but it’s family. That’s what every brothers want. You want to have that relationship where everyone looks out for one another."

Just before the event at the JCPenney in New York City, Joe had taken a 15-hour flight direct from India, during which he slept for "13 to 14 hours."

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TODAY -- Pictured: Joe Jonas on Thursday, December 6, 2018 -- (Photo by: Nathan Congleton/NBC/NBCU Photo Bank via Getty Images)
Joe Jonas kicked off JCPenney's national Giving Spree in New York City. (Credit: JCPenney)
NEW DELHI, INDIA - DECEMBER 4: Nick Janoss brother Joe Jonas with his fiancé Sophie Turner pose for photos during wedding reception of Bollywood actor Priyanka Chopra and American singer Nick Jonas at Taj Palace on December 4, 2018 in New Delhi, India. (Photo by Manoj Verma/Hindustan Times via Getty Images)
MUMBAI, INDIA - NOVEMBER 26: Bollywood actor Priyanka Chopra (L) with her fiancee Nick Jonas (R), his brother Joe Jonas and his fiancee Sophie Turner posed for photographs outside a restaurant at Juhu on November 26, 2018 in Mumbai, India. (Photo by Prodip Guha/Hindustan Times via Getty Images)
LOS ANGELES, CA - NOVEMBER 19: Joe Jonas is seen on November 19, 2018 in Los Angeles, California. (Photo by gotpap/Bauer-Griffin/GC Images)
SHANGHAI, CHINA - NOVEMBER 15: American singer and actor Joe Jonas attends Louis Vuitton Volez Voguez Voyagez Exhibition on November 15, 2018 in Shanghai, China. (Photo by VCG/VCG via Getty Images)
LOS ANGELES, CALIFORNIA - NOVEMBER 07: Nick Jonas and Joe Jonas attend a basketball game between the Los Angeles Lakers and and the Minnesota Timberwolves at Staples Center on November 07, 2018 in Los Angeles, California. (Photo by Allen Berezovsky/Getty Images)
BEVERLY HILLS, CA - OCTOBER 16: Joe Jonas attends the FENDI MANIA Capsule Collection Launch Event at Fendi on October 16, 2018 in Beverly Hills, California. (Photo by Stefanie Keenan/Getty Images for Fendi)
NEW YORK, NY - OCTOBER 05: Joe Jonas is seen in NoHo on October 5, 2018 in New York City. (Photo by Gotham/GC Images)
PARIS, FRANCE - OCTOBER 02: Sophie Turner and Joe Jonas attend the Louis Vuitton show as part of the Paris Fashion Week Womenswear Spring/Summer 2019 on October 2, 2018 in Paris, France. (Photo by Bertrand Rindoff Petroff/Getty Images)
PARIS, FRANCE - OCTOBER 01: Joe Jonas and Sophie Turner are seen leaving a restaurant on October 1, 2018 in Paris, France. (Photo by Pierre Suu/Getty Images)
NEW YORK, NY - SEPTEMBER 21: Joe Jonas is seen in SoHo on September 21, 2018 in New York City. (Photo by Gotham/GC Images)
NEW YORK, NY - SEPTEMBER 04: Sophie Turner, Joe Jonas, Nick Jonas, Priyanka Chopra at 2018 US Open at the 2018 US Open on September 4, 2018 in New York City. (Photo by Gotham/GC Images)
NEW YORK, NY - SEPTEMBER 4: Sophie Turner and boyfrend Joe Jonas, Priyanka Chopra, wearing her engagement ring and her fiance Nick Jonas attend Serena Williams' quarter-final victory on day 9 of the 2018 tennis US Open on Arthur Ashe stadium at the USTA Billie Jean King National Tennis Center on September 4, 2018 in Flushing Meadows, Queens, New York City. (Photo by Jean Catuffe/GC Images)
NEW YORK, NY - SEPTEMBER 3: Joe Jonas and Sophie Turner attend the defeats of Maria Sharapova and Roger Federer on day 8 of the 2018 tennis US Open on Arthur Ashe stadium at the USTA Billie Jean King National Tennis Center on September 3, 2018 in Flushing Meadows, Queens, New York City. (Photo by Jean Catuffe/GC Images)
NEW YORK, NY - SEPTEMBER 03: Kevin Jonas and Joe Jonas at Day 8 of the US Open held at the USTA Tennis Center on September 3, 2018 in New York City.
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"As you can imagine, I needed it after this week," he laughed. "[The wedding] felt like we were at summer camp. It was all of our closest friends -- including all of the ones we grew up with and toured with, friends of friends, family we haven’t seen -- and we’re all in this beautiful country together. To all of us, it was just like we were on a vacation. There wasn’t much sleep, as you could imagine. You could blame jet lag, but we’re just partying every night and celebrating their love, and it was just so fun to see these people again. It [was] just a 24-hour party -- with a nap!"

Nick and Priyanka's wedding represented one of the extremely rare moments that the entire Jonas family was able to get everyone together: Nick, Joe, Kevin, Frankie, their parents and more. It's that quality time that the DNCE frontman looks forward to most about the holidays, too.

"Quality time is what makes us the happiest," he said. "If we can get everybody in a room together, which isn’t easy for us because we’re always traveling, it’s gonna be cool. This year we’re doing it all together."

And as their family expands even more, the musician admitted that he's going to have to continue to change how he approaches the holiday season.

"I’m a little selfish where I’m like, ‘Well, I have to have Christmas with my family,'" Joe laughed. "It’s kind of like, pick and choose holidays and figure it out. Like, for us, I always do Friendsgiving rather than Thanksgiving with the family, only because it’s too crazy to see everyone at that time of year. As my family grows and grows, it just gets a little more complicated, but the exciting part for me is that everyone wants to spend it together still."

But before he gets to spend Christmas with the ones he loves, though, Joe made sure that he took the time to give back to those who aren't as fortunate as he is. The "Cake By The Ocean" hitmaker helped to kick off JCPenney's largest-ever national Giving Spree, which will surprise 25 kids in every continental US state and Puerto Rico with $100 gift cards to shop for presents at the chain.

"This is why I came back," Joe said. "I was going to stay a few more days, but I came back [from India] early for this amazing event. It's such a cool thing to be part of. You don't realize the impact until you see these kids' faces light up."

"What’s even more rewarding is that they want to spend it on other people," he added. "I always found that you assume young kids want to buy toys for themselves, but they’re like, ‘I want to buy something for my mom or my sister or older brother.’ That was really cool and encouraging."

RELATED: See photos from Nick Jonas and Priyanka Chopra's wedding:

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Happiest day of my life. @priyankachopra
Happiest day of my life. @priyankachopra
Bollywood actress Priyanka Chopra and musician Nick Jonas stand for photographs at their wedding reception in New Delhi, India, Tuesday, Dec. 4, 2018. (AP Photo/Altaf Qadri)
Bollywood actress Priyanka Chopra and musician Nick Jonas stand for photographs at their wedding reception in New Delhi, India, Tuesday, Dec. 4, 2018. (AP Photo/Altaf Qadri)
One of the most special things that our relationship has given us is a merging of families who love and respect each other's faiths and cultures. And so planning our wedding with an amalgamation of both was so so amazing. An important part of the pre wedding rituals for the girl in an Indian wedding is the Mehendi. Once again we made it our own and it was an afternoon that kicked off the celebrations in the way we both dreamed. @nickjonas
This was truly magical. @priyankachopra Link in bio @people
Family.
Bollywood actress Priyanka Chopra, third right and musician Nick Jonas, second right, stand for family photographs at their wedding reception in New Delhi, India, Tuesday, Dec. 4, 2018. (AP Photo/Altaf Qadri)
Joe Jonas and his fiancé and Game of Thrones actress Sophie Turner pose for photographs during the wedding reception of Bollywood actress Priyanka Chopra and musician Nick Jonas in New Delhi, India, Tuesday, Dec. 4, 2018. (AP Photo/Altaf Qadri)
Priyanka and I have been looking forward to the Sangeet (the musical evening and a pre-wedding ritual) to see what each side of the family had put together. We’re both so full of gratitude for the effort and the love put forth by both families. What an amazing start to a lifetime!! @priyankachopra
It all began as a fierce song & dance competition between the families but ended, as always, as a huge celebration of love.  Nick and I were looking forward to the Sangeet (musical evening), another pre wedding ritual.. and to see what each side had put together. And what a performance it was. Each family telling our stories through song and dance, filled with lots of laughter and love. We were both filled with gratitude for the effort, the love and the laughter and will carry the memories of this special evening for the rest of our lives. It is an amazing start to a lifetime of togetherness for our families and friends...#grateful @nickjonas 📹/📷: @calebjordanlee @josevilla @josephradhik
Bollywood actress Priyanka Chopra and musician Nick Jonas greet media during their wedding reception in New Delhi, India, Tuesday, Dec. 4, 2018. (AP Photo/Altaf Qadri)
Bollywood actress Priyanka Chopra and musician Nick Jonas stand for photographs at their wedding reception in New Delhi, India, Tuesday, Dec. 4, 2018. (AP Photo/Altaf Qadri)
Bollywood actress Priyanka Chopra and musician Nick Jonas arrive for their wedding reception in New Delhi, India, Tuesday, Dec. 4, 2018. (AP Photo/Altaf Qadri)
Friends.. family.. ❤️
So much love, tradition and celebration. Happy wedding, PC and NJ. We love you and your love. ❤️
First Indian wedding it was pure magic 💛
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