In 1986, the family moved to Lake Baikal, then to Tula, finally settling in Leningrad (now St. Petersburg) in 1987. In 1996 she joined the Imagine drama school, and after graduating from high school with specialism in mathematics and music (Harp Class) in 1996, joined the Shukin Theatre School under Valentina Nikolaenko.
From 2006 to 2011, Marina Aleksandrova was an Actress for the Sovremennik theater company in Moscow.
On 7 June 2008 Aleksandrova married fellow actor Ivan Stebunov. They divorced in 2010. After that she had a relationship with actor Alexander Domogarov. On 11 July 2012 she gave birth to a son. The child's name is Andrey, just after his father - a TV Director Andrey Boltenko. Aleksandrova gave birth to her second child on 26 September 2015 - a daughter named Yekaterina.
