He portrayed Karol Wojtyła, who later became Pope John Paul II, in the movie Karol: A Man Who Became Pope and its sequel Karol: The Pope, The Man.
Once he graduated from the Theatre Academy, he was hired by the Teatr Współczesny in Warsaw. His career in the film industry however grew much more intensively. His role of Stawrogin in Fyodor Dostoyevsky’s The Possessed started Piotr’s long list of roles. The breakthrough in his career was his part as Frédéric Chopin in the film "Chopin - Desire of Love" - and became a Polish star.
The climax of his popularity was reached when he played the title role of another Polish historical figure in a two part Italian movie - "Karol the Man who became Pope" and "Karol: The Pope -The Man". The movie was viewed by several dozen million viewers, and made him popular in Italy, Latin America, and many other Catholic countries.
Piotr also managed to take advantage of his popularity abroad to play at the Sala Uno Theatre in Rome, in Italian. He also played in Liliana Cavani’s movie "Einstein" and in the Portuguese production "Second Life".
In 2014, Adamczyk, Bartosz Opania and Paweł Domagała starred in the comedy film Wkrecrni.
He has been in over 800 radio roles and around 100 theatre, television and film parts. He is also appreciated for his dubbing roles. In animated films he voiced, among others, the giraffe in "Madagascar", Zigzag McQueen in "Cars", and Syndrome in "The Incredibles".
He has received many prestigious awards in Poland. In 2011, he was voted the most popular Polish actor once again.