Joe Jonas and Sophie Turner have broken up after four years of marriage, with Joe filing divorce papers on Sept. 5 in Miami Dade County, Fla., according to online records viewed by E! News. Joe stated that "the marriage between the parties is irretrievably broken," per the court documents obtained by E! News. He asked for "shared parental responsibility" with Sophie, and said a "parenting plan should be established" for their daughter Willa, 3, and another daughter, 14 months, whose initials were only listed as "D.J." in the docs. The Jonas Brothers singer also asked the court to uphold their prenuptial agreement from April 2019. His split with the Game of Thrones alum comes after speculation emerged about their relationship status over Labour Day Weekend. At the time, Sophie's rep declined to comment on the actress' personal life when reached by the media, while Joe's rep had no immediate comment. Yet, the two recently celebrated Joe's 34th birthday together in August.