Jerry Hall, wife of singer Mick Jagger, has filed for divorce following reports that Luciana Morad, 27, a Brazilian model, is expecting Mick’s child, Britain’s Sun tabloid reported Friday. Hall, 42, has been married to Rolling Stone Jagger, 55, for eight years, and the couple had been lovers for more than a decade before that. They have four children. The Sun said Hall had asked top London law firm of Mishcon de Reya, who acted for Princess Diana in her divorce from Prince Charles, to act for her. The Sun speculated that Hall would seek a divorce settlement of at least $50 million, almost a fifth of Jagger’s fortune.