The actress — whose estranged husband filed for divorce on Sept. 5 — has already surprised fans with a striking blonde bob and back tattoo as she films the new drama ‘Joan’

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Sophie Turner has returned to work.

The Game of Thrones alum, 27, was seen back on set of her upcoming ITVX series Joan following the news that her estranged husband Joe Jonas, 34, filed for divorce on Tuesday, Sept. 5, after four years of marriage.

While filming in Spain, Turner debuted a bold new look on set, including a blunt, platinum blonde bob wig and elaborate, sculptural white temporary tattoo that spanned her entire back. In Joan, Turner is portraying the role of notorious British jewel thief Joan Hannington.

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For his part, Jonas has been touring the U.S. with his brothers Nick and Kevin Jonas.

At their band’s recent show at Dodger Stadium in Los Angeles, he seemingly referenced the couple’s split.

Right before singing the group’s song “Hesitate” from their 2019 album Happiness Begins, which was inspired by Turner, an emotional Jonas told the crowd before him, “It’s been a crazy week,” which prompted fans to erupt with cheers.

“I just want to say, if you don’t hear it from these lips, don’t believe it. Okay?” the musician — who was not wearing his wedding ring — continued. “Thank you, everyone, for the love and support to me and my family. I love you guys.”

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Joe Jonas and Sophie Turner’s Relationship Timeline

In documents obtained by PEOPLE, the singer filed for a dissolution of marriage from the actress, which claims that “the marriage between the parties is irretrievably broken.”

The pair tied the knot in 2019 after nearly three years of dating and have two children together: Willa, 3, and a second daughter, identified in the divorce documents as “D,” 14 months.

The filing came days after PEOPLE reported Jonas had retained a divorce lawyer, despite continuing to wear his wedding band.

Sophie Tuner and Joe Jonas. NICHOLAS HUNT/GETTY
Joe Jonas Said Sophie Turner Had His ‘Back No Matter What’ Three Weeks Before Filing for Divorce

“Statement from the two of us,” the couple said in a joint statement to their social media accounts on Wednesday, Sept. 6. “’After four wonderful years of marriage we have mutually decided to amicably end our marriage.’”

“There are many speculative narratives as to why, but truly this is a united decision and we sincerely hope that everyone can respect our wishes for privacy for us and our children,” the statement concluded.

According to a source close to the couple, Turner and Jonas have been “living separate lives for months” and spent “the whole summer apart.”

 Joe Jonas Details Why He Keeps Marriage to Wife Sophie Turner Private: ‘It Makes Me a Better Person’

The X-Men: Apocalypse actress and the “Sucker” singer “haven’t gotten along in a while, but they’re hoping to resolve this all amicably.”

“As far as custody goes, this literally all just happened, so they’re figuring it out in real time,” the source added. “They did have a prenup. As a family, they were based in Florida. The kids were with him the last few months, traveling with him with family while he’s been on tour. Sophie’s been working in the U.K.”

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Days before Jonas filed for divorce, Turner was seen at Birmingham, U.K. bar Dropshot, as she celebrated what bar manager Hezron Stephenson told PEOPLE was a “wrap party” for the Birmingham portion of filming for her show, Joan.

“She was really down to earth,” Stephenson, 28, said, adding that Turner “seemed like she was in high spirits” as she spent time with her castmates and friends, playing beer pong and pool at the venue.

“She seemed very happy,” Stephenson added.