Olga Dinnikova was born in Riga, Latvia, in 1985. At the age of 12, she moved to Israel with her mother, where she lived for three years before relocating to Switzerland in 2000. There, she learned German, completed an apprenticeship as a men's fashion advisor, and eventually pursued her childhood dream. From 2004 to 2007, she studied film acting at the European Film Actor School in Zurich.

Her first role came in 2007 in the Swiss television series "Day and Night". She went on to make numerous appearances in film and television, including roles in the feature films "Marija" directed by Michael Koch, "Nightfall" directed by Simon Aeby, and "Ispansi" directed by Carlos Iglesias. On television, Olga was seen in productions such as the Bremen episode of Tatort titled "Im Toten Winkel" directed by Philip Koch and the Swiss television series "Der Bestatter" directed by Markus Fischer.

In 2014, Olga obtained her bachelor's degree in film from the Zurich University of the Arts, and she continued her studies in screenwriting in the master's program, which she also successfully completed in 2016.