Williams, 38, and Elverum, 40, quietly married and moved in together last summer. The news comes after The Greatest Showman actress was spotted without a wedding band during her last two public outings.
“Michelle and Phil separated at the beginning of the year. It was an amicable split and they remain, friends,” a source tells the publication.
Williams first confirmed their romance in a cover story forVanity Fair in July 2018, by mentioning her marriage to Elverum. Williams and Elverum wed in a small ceremony in the Adirondacks with a few friends and their daughters present.
Williams is mum to 12-year-old Matilda with the late Australian actor Heath Ledger; Elverum has a 3-year-old daughter from his first marriage.