The couple announced a divorce was in the works in September, but no paperwork had been filed. Court records show Sheremet filed in Los Angeles on Thursday.
Cibrian filed for divorce from his wife of eight years in August.
Sheremet is seeking spousal support and to have his attorney's fees paid by Rimes, who is a country singer and actress.
The couple have apparently already worked out how to divide their property.
Amid a storm, LeAnn Rimes talks about serenity
Apr 21, 2009 11:00 am PDT
LeAnn Rimes' new book, "What I Cannot Change," offers her take on the serenity prayer. And these days, she's practicing what she's been preaching. The singer and actress can't change the recent past tabloid reports alleging a roman...
LeAnn Rimes to sing national anthem at Ky. Derby
Apr 16, 2009 7:00 am PDT
Country music star LeAnn Rimes will help start a new tradition at the Kentucky Derby this year. Churchill Downs says Rimes will be the first national recording artist to sing "The Star-Spangled Banner" at the historic racetrack in Louisvi...
'My Little Pony' gets star treatment for charity
Jun 19, 2008 7:00 pm PDT
LeAnn Rimes is putting her own stamp on My Little Pony. The singer is among celebrities and artists who've agreed to design some new versions of My Little Pony, the plastic toy that has captivated girls since the 1980s. Pawtucket-based Ha...
LeAnn Rimes revels in critical success
Nov 13, 2007 12:00 pm PST
No one has ever denied LeAnn Rimes' talent as a singer: Her soaring voice has wowed audience since she was just 13, when she made her debut with the hit album "Blue" and earned a best new artist Grammy in the process. But as the years wen...
Music Review: LeAnn Rimes' `Family'
Oct 8, 2007 8:34 am PDT
LeAnn Rimes, "Family" (Curb) With "Family," LeAnn Rimes matures from a performer into an artist. Not only does this album triumphantly celebrate the difference between a great voice and a great vocalist; the 25-year-old former child star...