Jennifer Aniston offers wedding guidance to 'younger sister' Selena Gomez before marriage to Benny Blanco

NEW YORK CITY, NEW YORK: Jennifer Aniston couldn’t be happier for her dear friend Selena Gomez now that she’s engaged to Benny Blanco.

According to an exclusive source from In Touch, Jennifer is supposed to be the front and center at the wedding celebrations, joined by other famous besties like Taylor Swift, Meryl Streep, Cara Delevingne, Ariana Grande.

Reportedly, the wedding is shaping up to be an event filled with star power, and the excitement is already buzzing.

Jennifer Aniston steps up as Selena Gomez's 'big sister' with wedding advice

As the couple begins planning their nuptials, the guest list is already a topic of fascination.

“Of course, Selena is going to have Taylor Swift and Blake Lively and that whole contingent, but she’s also going to have some unexpected people like Meryl Streep and Jennifer Aniston,” the source revealed.

Aniston, 55, has had a close bond with Gomez since the two met in a bathroom at a Vanity Fair event.

As per E! News, their friendship blossomed from that moment, with Aniston fondly describing Gomez as “just like a little cherub that I feel like I wanna take care of” during a 2015 Golden Globes afterparty.

“She’s been extremely supportive and wonderful,” Aniston said at the time.

“Jennifer treats Selena like a younger sister,” the source continued.

“She’s very excited for her and has already sent flowers and a card offering to help out however she can. She’s planned a couple of weddings herself, so she knows a whole lot about the process and has a lot of advice to share.”

For Gomez, Aniston's guidance is invaluable.

“No doubt Selena will be happy to have her guidance. It’s hard enough planning a wedding, but a celebrity one is on a different level, so any help she can get will be appreciated,” the insider added.

Selena Gomez and Benny Blanco wedding to have 'incredible number of celebrity guests'

Selena Gomez, 32, and Benny Blanco, 36, both have deep roots in the entertainment industry.

While Gomez captured hearts as a Disney star and pop sensation, Blanco has made his mark as a record producer, songwriter, and record executive.

“Whenever this happens, there will be an incredible number of celebrity guests,” the insider shared.

“It’s not just Selena that has a ton of famous friends. Benny has been in the music business for more than a decade. He’s worked with a ton of people and stayed tight with many of them, so it’s safe to say he will draw a lot of star power as well.”

After just over a year of dating, the 'Wizards of Waverly Place' alum announced her engagement on Instagram on December 11 with a photo of her dazzling ring and a sweet picture of the couple, captioned, “Forever begins now…”.

Gomez's joy was palpable when she told Time, “It just happens when you least expect it. I just cherish every moment with him. I don’t know what the future holds, but I do know that he’s not going anywhere any time soon.”

Blanco, equally smitten, opened up about their relationship on The Howard Stern Show in May, saying, “I look at her … I’m always just like, I don’t know a world where it could be better than this … People always said this to me: when you know you meet your best friend. She truly is my best friend.”