Nicole Appleton and Liam Gallagher are reportedly filing for divorce on Tuesday morning.
The pair's case, filed under "Appleton NM v Gallagher LJP", is the second in a list of 12 divorce hearings set to start at 10am at London's High Court.
Nicole and Liam's marriage hit the rocks last July after it emerged that the former Oasis singer had fathered a love child with American journalist Liza Ghorbani.
Nicole, 39, was said to have been "devastated" when she heard the news while on holiday in Florida with her older sisters Lori, Lee and Natalie.
Liam was performing at a festival in Ibiza when he broke the news to his estranged wife over the phone. The couple are parents to 13-year-old Gene.
"Liam phoned her the day before it came out and he hasn't been in touch since," Nicole's mother Mary told The Sun at the time. "She can't get hold of him. She's absolutely devastated. This is so out of character for the Liam I know."
After the rock star's affair hit headlines, journalist Liza — who had given birth to Liam's daughter — launched a £2million child support lawsuit. The pair first met when Liza interviewed him for The New York Times and started an affair that carried on for about three months after the baby was born.
He allegedly ended their romance when she told him she was suing him for child support.
Liam, 41, then started dating his former personal assistant Debbie Gwyther, who managed his new band Beady Eye. The couple moved in together and Liam started divorce proceedings last August.
Liam and Nicole were first romantically linked in 2000 and married eight years later on Valentine's Day in 2008. The couple lived in a five-bedroom house in Hampstead, North London.