diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index c288e8c2ff4a..c81d86ca1f67 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -440,6 +440,12 @@
     githubId = 173595;
     name = "Caleb Maclennan";
   };
+  ALEX11BR = {
+    email = "alexioanpopa11@gmail.com";
+    github = "ALEX11BR";
+    githubId = 49609151;
+    name = "Popa Ioan Alexandru";
+  };
   alexarice = {
     email = "alexrice999@hotmail.co.uk";
     github = "alexarice";
diff --git a/pkgs/applications/misc/themechanger/default.nix b/pkgs/applications/misc/themechanger/default.nix
new file mode 100644
index 000000000000..7dd52c8ccef4
--- /dev/null
+++ b/pkgs/applications/misc/themechanger/default.nix
@@ -0,0 +1,65 @@
+{ lib
+, gobject-introspection
+, meson
+, ninja
+, pkg-config
+, wrapGAppsHook
+, desktop-file-utils
+, glib
+, gtk3
+, python3
+, gsettings-desktop-schemas
+, python3Packages
+, fetchFromGitHub
+}:
+
+python3Packages.buildPythonApplication rec {
+  pname = "themechanger";
+  version = "0.10.1";
+  format = "other";
+
+  src = fetchFromGitHub {
+    owner = "ALEX11BR";
+    repo = "ThemeChanger";
+    rev = "v${version}";
+    sha256 = "1bxxn5bmdwaxfvyh6z2rxklwnxgvv6kh5y9m8r1k7d0n4msx1x2h";
+  };
+
+  nativeBuildInputs = [
+    gobject-introspection
+    meson
+    ninja
+    pkg-config
+    wrapGAppsHook
+    desktop-file-utils
+    gtk3
+  ];
+
+  buildInputs = [
+    glib
+    gtk3
+    python3
+    gsettings-desktop-schemas
+  ];
+
+  propagatedBuildInputs = with python3Packages; [
+    pygobject3
+  ];
+
+  postPatch = ''
+    patchShebangs postinstall.py
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/ALEX11BR/ThemeChanger";
+    description = "A theme changing utility for Linux";
+    longDescription = ''
+      This app is a theme changing utility for Linux, BSDs, and whatnots.
+      It lets the user change GTK 2/3/4, Kvantum, icon and cursor themes, edit GTK CSS with live preview, and set some related options.
+      It also lets the user install icon and widget theme archives.
+    '';
+    maintainers = with maintainers; [ ALEX11BR ];
+    license = licenses.gpl2Plus;
+    platforms = platforms.linux;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 75af54aebf84..53b0f9c450f4 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -28010,6 +28010,8 @@ with pkgs;
 
   tev = callPackage ../applications/graphics/tev { };
 
+  themechanger = callPackage ../applications/misc/themechanger { };
+
   thinkingRock = callPackage ../applications/misc/thinking-rock { };
 
   thonny = callPackage ../applications/editors/thonny { };