The Angelina Jolie Brad Pitt divorce shocked fans although the alleged reason behind the split is something that has been rumored in the past months.

Jolie filed for divorce from Pitt on Monday after 12 years of being together. The Hollywood A-list couple has been together since 2004 after they worked together in the Mr. & Mrs. Smith movie. They were dubbed as Brangelina soon after their romance became public.  Pitt and Jolie got married in August 2014.

There were several alleged reasons for the Angelina Jolie Brad Pitt divorce.

First, the actress reportedly confirmed that her husband has been cheating on her with his co-star Marion Cotillard. Page Six reported that Jolie hired a private investigator to spy on Pitt on set, which led her to believe that he is being unfaithful to her.

The actress is reportedly also tired of constant bickering over their lifestyle. Jolie apparently wants to quit acting to devote her time on humanitarian work while Pitt wants to do otherwise.

Jolie filed for divorce citing “irreconcilable differences.”

The Angelina Jolie Brad Pitt divorce papers listed the date of separation as September 15. It also indicated that the actress is seeking physical custody of their six children and is asking the judge to give Pitt visitation rights. The Hollywood A-list couple has six kids. They adopted Maddox, Pax and Zahara and have three biological children – Shiloh and twins Knox and Vivienne. Jolie is not seeking spousal support.

Jolie’s manager Geyer Kosinski told E! News: “Angelina will always do what’s in the best interest of taking care of her family. She appreciates everyone’s understanding of their need for privacy at this time.”

Pitt, meanwhile, said in a statement that he is very saddened by the split.  He also asked the media to give them space during this time.

Jolie and Pitt were last seen together in mid-July while celebrating the birthday of their twin.

Top lawyer Laura Wasser will represent Jolie. Wasser’s previous clients include Johnny Depp, Kim Kardashian and Britney Spears.

Stay tuned for more Angelina Jolie Brad Pitt divorce updates.