His father, Yury Lavrov, was a popular Russian and Ukrainian stage and film actor designated People's Artist of Ukraine in 1948.

Young Kirill Yuryevich Lavrov was fond of literature and theater from an early age, and was exposed to a highly stimulating intellectual environment in his family.

He was also a good sportsman: he took gymnastics, fencing, skiing, and was a member of the youth football (soccer) team at "Spartak" sports club in Leningrad.

There he joined the troupe at Kyiv Lesya Ukrainka National Academic Theater as understudy actor and soon made appearances in classic and contemporary plays.

After five years at Kyiv theatre, Kirill Lavrov was invited to become permanent member of the troupe at Leningradsky Bolshoi Drama Theater and moved to Saint Petersburg.