Sofia Vergara Is Single Again: Report
On Monday, the Modern Family actress, 39, attended the Met Gala in New York City solo and told other guests that the relationship had ended, the New York Post reports.
A rep for Vergara was not immediately available for comment.
In March, Vergara said she wasn't in any rush to get married or start a family with Loeb.
"They have been fighting a lot recently and have been on the brink of splitting many times," a source told the Post.
The couple first stepped out together in 2010, the same year Loeb was critically injured in a car accident. He later made a full recovery and even considered a run for the U.S. Senate in 2012.