Carey Mulligan and Marcus Mumford – 8 years
According to the Sun, these two knew each other since they were kids; they were childhood pen pals. An insider told the paper that they were exchanging letters through the church, but after their careers took off and things got more serious, they started talking again.
Their romance blossomed in 2012, and they tied the knot. The actress and the rock wed at a farm in Somerset, United Kingdom. They have 2 kids together.