The source also tells ET that although Tuesday's court filing was filed by attorney Samantha Bley DeJean, high-powered attorney Laura Wasser is still working on Jolie's case, and that DeJean and Wasser are working together.
"[Pitt] has a statutory duty to pay child support".
Angelina Jolie and Brad Pitt attend a special screening of "By The Sea" on November 3, 2015, in NY.
"Given the informal arrangements around the payment of the children's expenses have not been regularly sustained by Pitt for over a year and a half, Jolie intends to file an RFO [request for a court order] for the establishment of a retroactive child support order".
"From the start, Angelina has been focused on their health and needs, which is why it was so important that this last court hearing be conducted privately", the statement provided by her representative continued.
Former Tamil Nadu chief minister Karunanidhi dies at 94
DMK president M Karunanidhi passed away on Monday after prolonged illness at the age of 94 in Chennai's Kauvery Hospital . Lot of supporters were seen in tears as they expressed their pain on the deteriorating health of their leader.
Angelina and Brad split in September 2016 after two years of marriage. In June, however, the court ordered Jolie to help fix Pitt's relationships with his children, as "not having a relationship with their father is harmful to them".
Jolie was granted physical custody of all six children in a December 2016 custody agreement, but last month, she was ordered by a judge to help fix the children's relationship with their father.
The arrangement for child support was allegedly informal, per the TMZ report, but Jolie claims that Pitt has not even lived up to those informal expectations.
"It's just been the hardest time, and we're just kind of coming up for air", she told the magazine, shortly after moving into a $25 million, six-bedroom, 10-bathroom home with her children in the Los Angeles neighborhood Los Feliz.
But a source claims to ET that Jolie's latest move is in retaliation over the actress being ordered by a judge in June to help fix her children's relationship with Pitt.
In the filing, Jolie's lawyers requested to appear before a judge to schedule a status conference to address the financial issue.