Mildeberg’s works have been displayed in a multitude of exhibitions around the world. To date, he has had 47 solo exhibitions in countries including Estonia, Finland, Sweden, the Netherlands, the United States, Japan, and France.

Selected exhibitions:

2024
Exhibition of Estonian and Spanish illustrators “Reflections”,  Estonian Children’s Literature Centre
Exhibition of Estonian illustrators "Capturing Wonder with Pictures", Kärdla Culture Centre

2023
VII Tallinn Illustrations Triennial (TIT 2023), Estonian Museum of Architecture
International exhibition of illustration "Fox Spirit. Fox Charm", Nadbałtyckie Centrum Kultury, Poland

2022
International exhibition of illustration "Fox Spirit. Fox Charm", Estonian Children's Literature Centre, Estonian National Museum, Latvian National Library
Tallinn Illustration Triennial TIT 2020, Centrum Kultury Dworek Białoprądnicki , Poland
Exhibition of Baltic illustrators "Running with Wolves. Werewolf", Italy and Latvia
Group exhibition of Estonian artists „Secret Lives III”, The Estonian National Museum

2021
Exhibition of Baltic illustrators "Running with Wolves. Werewolf", Napoli, Rome, Frigento, Italy
Exhibition of Estonian illustrators "Secret Lives III", Szczecin, Gdansk, Poland; Kondas Centre, Viljandi; Estonian National Museum, Tartu
Tallinn Illustrations Triennial TIT 2020, Moscow, Krasnoarmeysk, Russia
"Leafing Through Estonian Children's Books IV", Moscow
TIT 2020 & "Leafing Through Estonian Children's Books IV", Mytishchi, Russia
Exhibition of Estonian illustrators "Fox Spirit. Fox Charm", Estonian Children's Literature Centre, Tallinn; Central Library of Lääne County, Haapsalu
Children's Books' Illustrations from Estonian artists, Kehra
Exhibition of Estonian illustrators "From the Mountains to the Sea", Haapsalu
"Leafing Through Estonian Children's Books V", Pskov, Russia
Solo exhibition "Rehepapp" (November), Haus-Gallery, Tallinn
Joint exhibition  with Viive Noor, Piret Pusa Bergmann, Aleksei Kornilov, Lido, Vytebsk, Minsk, Belarus
Participation in international art project "Museum of Supernatural History", St. Petersburg
Participation in the 12th international doll exhibition "The Art of the Doll", Moscow

2020
Tallinn Illustration Triennial (TIT), Estonia
Group exhibition of Estonian artists „Secret Lives III”, Warsaw, Płock, Kraków, Poland
Group exhibition of Estonian illustrators “Leafing Through Estonian Children’s Books III”, Moscow, Russia
International illustrations exhibition "It's Always Tea-Time", Vyborg, St. Petersburg, Russia; Viljandi
Exhibition of Estonian illustrators "Once Upon a Time" (Grimm's Fairy Tales), Tapa Public Library; Gallery Deák17, Budapest, Hungary
Exhibition of Estonian illustrators “From the Mountains to the Sea”, Central Library of Saare County, Kuressaare
Solo exhibition "Rehepapp" (November), Haus-Gallery, Tallinn
Joint exhibition with Viive Noor, Aleksei Kornilov, Piret Bergmann (Pusa), Minsk, Grodno, Orša, Belarus

2019
Biennial of Illustrations Bratislava (BIB), Slovakia
Exhibition of Estonian illustrators “From the Mountains to the Sea”, Kraków, Rabka-Zdrój,
Elbląg, Poland
International illustrations exhibition "It's Always Tea-Time", Moscow, Krasnoarmeysk, Mytishchi, Russia
Exhibition of Estonian illustrators "Once Upon a Time" (Grimm's Fairy Tales), Gdansk, Opole, Poland; Tapa Public Library
Joint exhibition with Piret Mildeberg "Mythomania", Kolga Manor Gallery
International art projects with Studio 14: "Running with Wolves", Hiiumaa Museum; "Factory of Dreams. Anthropology in mixed media", Berlin; "Room of Fears", St. Petersburg; exhibition project "5 emotions", St. Petersburg; international art festival, Latvian Railway Museum, Riga

2018–2020
Exhibition of Baltic illustrators “Running with Wolves”, London, the United
Kingdom; Estonian Children’s Literature Centre (“Wolf Run”), Tallinn; Gdańsk, Wrocław,
Białystok, Warsaw, Płock, Szczecin, Poland; Pordenone, Italy; Vilnius, Lithuania

2018–2019
Exhibition of Estonian illustrators “Running with Wolves”, Estonian Children’s
Literature Centre, Tallinn; selected works, Pskov, St. Petersburg, Russia

2017
Biennial of Illustrations Bratislava (BIB), Slovakia

2016
Spring exhibition of Estonian illustrators, Estonian Children’s Literature Centre
Exhibiton of Estonian illustrators “Neighbours Who Love Reading”, Pskov City Library, Russia

2016–2018
Group exhibition of Estonian artists „Secret Lives I”, hotel Sofitel in Strasbourg, Embassy of Estonia in Paris, France

2015–2020
International illustration exhibition, “It’s Always Tea-Time”, Estonian Children’s Literature Centre, Tallinn; Riga, Latvia; Uusikaupunki, Finland; Gdansk, Wrocław, Toruń, Elbląg, Poland; Berlin, Germany; Szczecin, Płock, Poland; Budapest, Hungary; Oxford, the United Kingdom; Moscow, Krasnoarmeysk, Mytishchi, Vyborg, St. Petesburg, Russia

2015–2019
Exhibition of Estonian Illustrators, “Once Upon a Time...” (Grimm’s Fairy Tales),
Aosta, Anagni, Lagonegro, Bernalda-Metaponto, Corato, Matera, Roma, Lacco Ameno,
Irsina, Siracusa, Sassari, Roma, Bologna, Italy; Estonian Children’s Literature Centre,
Tallinn; Minsk, Belarus; Kraków, Łomża, Białystok, Szczecin, Płock, Warszaw, Elbląg,
Gdańsk, Opole, Poland

2014–2017
“Tallinn Illustration Triennial 2013. Estonian Illustrators”, Estonia, Poland

2013–2015
Exhibition by Estonian and Hungarian Illustrators, “Crisscross Stories”, Estonia, Hungary, the United Kingdom

2013
Biennial of Illustrations Bratislava (BIB), Slovakia
Tallinn Illustrations Triennial (TIT), Estonia
Travelling exhibition of Estonian illustration, “Etelästä tuulee – Lõunatuul puhub” (The South Wind Blows), Finland

2012–2013
Exhibition by Estonian illustrators, “Old Fairy Tales” (Brothers Grimm), Estonia, Russia

2012
Group exhibition „Four Is Better than Three”, Estonia, Finland

2011–2018
Exhibition of artists from the Baltic Sea countries, “Sea Fairy Tales”, Estonia, Finland, Russia, Poland, Germany, Denmark, Estonia

2010–2011
Travelling Exhibition of Estonian Book Illustration, Russia, Finland