Jiří Krejčí was born in Prague in Vinohrady. He studied acting at the Prague conservatory but he made his first appearance on stage at the State Opera at the age of 4 in Madame Butterfly as a little Pinkerton. As a child he also had the opportunity to play various  small roles for world recognized film directors: Juraj Jakubisko (Ambiguous Report about the End of the World), Emir Kusturica (Underground) or Jan Svěrák (Dark Blue World).
In 2016, he played a detective Jan Myškovský alongside Leoš Noha in the series Wasteland for HBO. He appeared In the mini-series Brecht, in the role of director Erich Engl and also in an small role in Narziss und Goldmund of Oscar-winning director Stefan Ruzowitzky. In 2020, he also played the role of Hauptman Rawitsch in Netflix series Charité 3.
He has acted in many projects on Czech television including the Wanderers (directed by V. Olmer) and the series Ambulance 2, Assassination - Branch Office, Cases of the 1st Department, Specialists.
However, his foremost occupation is in the theater. Since 2003, he has widely collaborated with the Jiří Srnec Black Theater, where he has staged e. g. the main role of "Inventor", in the performance Flying velocipede for world tours. With this theater he toured numerous festivals in Europe, South and Central America and China.
Nowadays, Jiří travels through the Czech Republic with the Metropolitan Theater in Prague, the Natalie Venturová Theater, Theater company Julie Jurištová DEDIVA. In Prague, he is a member of the Divadlo MA theater ensemble.
In addition to acting, he performs dubbing. He dubbed Sean Astin (Lord of the Rings triology), Chedwick Boseman (42), Ed Skrein (Deadpool), Chris Hemsworth (Crazy Vacation) and Ray Fisher (Justice League).
You can hear him narrating in documentaries for Czech TV channels and he is the voice of the Internet television programs of Playtvak.cz and Televizeseznam.cz.
He loves theater, traveling, learning about new cultures, good food, diving and motorbiking.