diff --git a/.changeset/wild-owls-divide.md b/.changeset/wild-owls-divide.md
new file mode 100644
index 0000000000..d903b76bd0
--- /dev/null
+++ b/.changeset/wild-owls-divide.md
@@ -0,0 +1,5 @@
+---
+'@backstage/ui': patch
+---
+
+Fix default font wight and font family in Backstage UI.
diff --git a/packages/ui/src/css/core.css b/packages/ui/src/css/core.css
index cddbac0a40..7876baccea 100644
--- a/packages/ui/src/css/core.css
+++ b/packages/ui/src/css/core.css
@@ -29,5 +29,7 @@
   body {
     background-color: var(--bui-bg);
     color: var(--bui-fg-primary);
+    font-family: var(--bui-font-regular);
+    font-weight: var(--bui-font-weight-regular);
   }
 }