According to court records, obtained by The Blast, Fergie made the first legal move and filed for divorce Friday in a Pasadena court.
The former couple first announced their split in September, 2017, telling fans, "With absolute love and respect we decided to separate as a couple earlier this year."
They explained that they wanted to keep the matter private for a while so that their family could adjust before going public.
The two first began dating in 2004 before getting engaged in 2007 and finally tying the knot in 2009.
They have one son together, 5-year-old Axl Jack Duhamel.