Slightly more than a year after Dean Sheremet and LeAnn Rimes separated after seven years of marriage, he is set to give marriage another go -- with his new fiance, photographer Sarah Silver, a source confirms to PEOPLE.
And Rimes's reaction?
"Congrats to @deansheremet and @sarah_silver on your engagement!," the Grammy winner, 28, Tweeted Saturday. "A little birdie told me the happy news last night. Wishes for a life full of happiness."