Back in April, the actress was served custody papers while speaking on stage in Las Vegas at the CinemaCon convention, a gathering of over 4,000 film executives and movie theater owners.
While Jason's team said he didn't know Olivia would be formally served as she gave a live presentation, she's calling his bluff.
"Jason's actions were clearly intended to threaten me and catch me off guard. He could have served me discreetly, but instead he chose to serve me in the most aggressive manner possible," she said in new court documents, which were obtained by MailOnline. "The fact that Jason would embarrass me professionally and put our personal conflict on public display in this manner is extremely contrary to our children's best interests."
The legal tactics was "outrageous," she insisted.
Jason, 46, and Olivia, 38, dated for nine years before splitting in late 2020. They share two children, son Otis, 8, and daughter Daisy, 5. Both children were born in New York, which is where Jason wants to raise them. Olivia, he claims, has a different vision.
"First, Olivia said that if I did not reside full-time in Los Angeles, she would allow me to spend time with Otis and Daisy on weekends and during vacation periods – thus depriving me of my right to parent the children during important periods of their lives…," he said. "Second, Olivia said that she intended to relocate with the children to London following the close of school in 2023."
Olivia has been living primarily in London with boyfriend Harry Styles.
In his own legal paperwork, the "Ted Lasso" star said he was reluctant to serve Olivia and claimed that he wanted it done in a "benign" manner. He specifically requested that it not be done at Harry's home.
"I did not want service to take place at the home of Olivia's current partner because Otis and Daisy might be present. I did not want service to take place at the children's school because parents might be present," he said.
Speaking about the Olivia's dramatic serving on stage, Jason added, "I understand that the process server had only done her job; however, I deeply regret what happened. Olivia's talk was an important event for Olivia, both professionally and personally, and I am very, very sorry that the incident marred her special moment."