diff --git a/Base/etc/WindowServer.ini b/Base/etc/WindowServer.ini
index 5afbb8517c4..c672e286127 100644
--- a/Base/etc/WindowServer.ini
+++ b/Base/etc/WindowServer.ini
@@ -10,8 +10,8 @@ Height=768
 ScaleFactor=1
 
 [Fonts]
-Default=Katica 10 400
-FixedWidth=Csilla 10 400
+Default=Katica 10 400 0
+FixedWidth=Csilla 10 400 0
 
 [Theme]
 Name=Default
diff --git a/Tests/LibGfx/BenchmarkGfxPainter.cpp b/Tests/LibGfx/BenchmarkGfxPainter.cpp
index c7534dc4657..a9c8707c3d7 100644
--- a/Tests/LibGfx/BenchmarkGfxPainter.cpp
+++ b/Tests/LibGfx/BenchmarkGfxPainter.cpp
@@ -16,7 +16,7 @@
 static struct FontDatabaseSpoofer {
     FontDatabaseSpoofer()
     {
-        Gfx::FontDatabase::the().set_default_font_query("Katica 10 400"sv);
+        Gfx::FontDatabase::the().set_default_font_query("Katica 10 400 0"sv);
     }
 } g_spoof;
 
diff --git a/Tests/LibGfx/TestFontHandling.cpp b/Tests/LibGfx/TestFontHandling.cpp
index a49f6648baa..5dad37a112b 100644
--- a/Tests/LibGfx/TestFontHandling.cpp
+++ b/Tests/LibGfx/TestFontHandling.cpp
@@ -14,7 +14,7 @@
 
 TEST_CASE(test_fontdatabase_get_by_name)
 {
-    const char* name = "Liza 10 400";
+    const char* name = "Liza 10 400 0";
     auto& font_database = Gfx::FontDatabase::the();
     EXPECT(!font_database.get_by_name(name)->name().is_null());
 }
@@ -22,7 +22,7 @@ TEST_CASE(test_fontdatabase_get_by_name)
 TEST_CASE(test_fontdatabase_get)
 {
     auto& font_database = Gfx::FontDatabase::the();
-    EXPECT(!font_database.get("Liza", 10, 400)->name().is_null());
+    EXPECT(!font_database.get("Liza", 10, 400, 0)->name().is_null());
 }
 
 TEST_CASE(test_fontdatabase_for_each_font)
diff --git a/Userland/Libraries/LibGUI/TextEditor.cpp b/Userland/Libraries/LibGUI/TextEditor.cpp
index b4961fbdd67..29b16be858f 100644
--- a/Userland/Libraries/LibGUI/TextEditor.cpp
+++ b/Userland/Libraries/LibGUI/TextEditor.cpp
@@ -609,7 +609,7 @@ void TextEditor::paint_event(PaintEvent& event)
                     }
                     auto font = unspanned_font;
                     if (span.attributes.bold) {
-                        if (auto bold_font = Gfx::FontDatabase::the().get(font->family(), font->presentation_size(), 700))
+                        if (auto bold_font = Gfx::FontDatabase::the().get(font->family(), font->presentation_size(), 700, 0))
                             font = bold_font;
                     }
                     draw_text_helper(span_start, span_end, font, span.attributes);
diff --git a/Userland/Libraries/LibGUI/Widget.cpp b/Userland/Libraries/LibGUI/Widget.cpp
index 78af0d96559..1fb396245bc 100644
--- a/Userland/Libraries/LibGUI/Widget.cpp
+++ b/Userland/Libraries/LibGUI/Widget.cpp
@@ -753,25 +753,25 @@ void Widget::set_font(const Gfx::Font* font)
 
 void Widget::set_font_family(const String& family)
 {
-    set_font(Gfx::FontDatabase::the().get(family, m_font->presentation_size(), m_font->weight()));
+    set_font(Gfx::FontDatabase::the().get(family, m_font->presentation_size(), m_font->weight(), m_font->slope()));
 }
 
 void Widget::set_font_size(unsigned size)
 {
-    set_font(Gfx::FontDatabase::the().get(m_font->family(), size, m_font->weight()));
+    set_font(Gfx::FontDatabase::the().get(m_font->family(), size, m_font->weight(), m_font->slope()));
 }
 
 void Widget::set_font_weight(unsigned weight)
 {
-    set_font(Gfx::FontDatabase::the().get(m_font->family(), m_font->presentation_size(), weight));
+    set_font(Gfx::FontDatabase::the().get(m_font->family(), m_font->presentation_size(), weight, m_font->slope()));
 }
 
 void Widget::set_font_fixed_width(bool fixed_width)
 {
     if (fixed_width)
-        set_font(Gfx::FontDatabase::the().get(Gfx::FontDatabase::the().default_fixed_width_font().family(), m_font->presentation_size(), m_font->weight()));
+        set_font(Gfx::FontDatabase::the().get(Gfx::FontDatabase::the().default_fixed_width_font().family(), m_font->presentation_size(), m_font->weight(), m_font->slope()));
     else
-        set_font(Gfx::FontDatabase::the().get(Gfx::FontDatabase::the().default_font().family(), m_font->presentation_size(), m_font->weight()));
+        set_font(Gfx::FontDatabase::the().get(Gfx::FontDatabase::the().default_font().family(), m_font->presentation_size(), m_font->weight(), m_font->slope()));
 }
 
 void Widget::set_min_size(const Gfx::IntSize& size)
diff --git a/Userland/Libraries/LibGUI/Wizards/CoverWizardPage.cpp b/Userland/Libraries/LibGUI/Wizards/CoverWizardPage.cpp
index cbc5f694272..72f297c761d 100644
--- a/Userland/Libraries/LibGUI/Wizards/CoverWizardPage.cpp
+++ b/Userland/Libraries/LibGUI/Wizards/CoverWizardPage.cpp
@@ -28,7 +28,7 @@ CoverWizardPage::CoverWizardPage()
     m_content_widget->layout()->set_margins(20);
 
     m_header_label = m_content_widget->add<Label>();
-    m_header_label->set_font(Gfx::FontDatabase::the().get("Pebbleton", 14, 700));
+    m_header_label->set_font(Gfx::FontDatabase::the().get("Pebbleton", 14, 700, 0));
     m_header_label->set_text_alignment(Gfx::TextAlignment::TopLeft);
     m_header_label->set_fixed_height(48);
 
diff --git a/Userland/Libraries/LibGfx/BitmapFont.cpp b/Userland/Libraries/LibGfx/BitmapFont.cpp
index d29fc644f63..6907bb661ab 100644
--- a/Userland/Libraries/LibGfx/BitmapFont.cpp
+++ b/Userland/Libraries/LibGfx/BitmapFont.cpp
@@ -345,7 +345,7 @@ ALWAYS_INLINE int BitmapFont::unicode_view_width(T const& view) const
 
 String BitmapFont::qualified_name() const
 {
-    return String::formatted("{} {} {}", family(), presentation_size(), weight());
+    return String::formatted("{} {} {} {}", family(), presentation_size(), weight(), slope());
 }
 
 String BitmapFont::variant() const
@@ -366,7 +366,7 @@ Font const& Font::bold_variant() const
 {
     if (m_bold_variant)
         return *m_bold_variant;
-    m_bold_variant = Gfx::FontDatabase::the().get(family(), presentation_size(), 700);
+    m_bold_variant = Gfx::FontDatabase::the().get(family(), presentation_size(), 700, 0);
     if (!m_bold_variant)
         m_bold_variant = this;
     return *m_bold_variant;
diff --git a/Userland/Libraries/LibGfx/FontDatabase.cpp b/Userland/Libraries/LibGfx/FontDatabase.cpp
index fee528d24e2..454ba0cb363 100644
--- a/Userland/Libraries/LibGfx/FontDatabase.cpp
+++ b/Userland/Libraries/LibGfx/FontDatabase.cpp
@@ -138,11 +138,12 @@ RefPtr<Gfx::Font> FontDatabase::get_by_name(StringView name)
     auto it = m_private->full_name_to_font_map.find(name);
     if (it == m_private->full_name_to_font_map.end()) {
         auto parts = name.split_view(" "sv);
-        if (parts.size() >= 3) {
+        if (parts.size() >= 4) {
+            auto slope = parts.take_last().to_int().value_or(0);
             auto weight = parts.take_last().to_int().value_or(0);
             auto size = parts.take_last().to_int().value_or(0);
             auto family = String::join(' ', parts);
-            return get(family, size, weight);
+            return get(family, size, weight, slope);
         }
         dbgln("Font lookup failed: '{}'", name);
         return nullptr;
@@ -150,10 +151,10 @@ RefPtr<Gfx::Font> FontDatabase::get_by_name(StringView name)
     return it->value;
 }
 
-RefPtr<Gfx::Font> FontDatabase::get(const String& family, unsigned size, unsigned weight)
+RefPtr<Gfx::Font> FontDatabase::get(const String& family, unsigned size, unsigned weight, unsigned slope)
 {
     for (auto typeface : m_private->typefaces) {
-        if (typeface->family() == family && typeface->weight() == weight)
+        if (typeface->family() == family && typeface->weight() == weight && typeface->slope() == slope)
             return typeface->get_font(size);
     }
     return nullptr;
diff --git a/Userland/Libraries/LibGfx/FontDatabase.h b/Userland/Libraries/LibGfx/FontDatabase.h
index 35c98bfb08f..9965b6f72ef 100644
--- a/Userland/Libraries/LibGfx/FontDatabase.h
+++ b/Userland/Libraries/LibGfx/FontDatabase.h
@@ -42,7 +42,7 @@ public:
     static void set_default_font_query(String);
     static void set_fixed_width_font_query(String);
 
-    RefPtr<Gfx::Font> get(const String& family, unsigned size, unsigned weight);
+    RefPtr<Gfx::Font> get(const String& family, unsigned size, unsigned weight, unsigned slope);
     RefPtr<Gfx::Font> get(const String& family, const String& variant, unsigned size);
     RefPtr<Gfx::Font> get_by_name(StringView);
     void for_each_font(Function<void(const Gfx::Font&)>);
diff --git a/Userland/Libraries/LibGfx/TrueTypeFont/Font.h b/Userland/Libraries/LibGfx/TrueTypeFont/Font.h
index 7bba4765ada..dacb1597864 100644
--- a/Userland/Libraries/LibGfx/TrueTypeFont/Font.h
+++ b/Userland/Libraries/LibGfx/TrueTypeFont/Font.h
@@ -145,7 +145,7 @@ public:
     virtual size_t glyph_count() const override { return m_font->glyph_count(); }
     virtual String family() const override { return m_font->family(); }
     virtual String variant() const override { return m_font->variant(); }
-    virtual String qualified_name() const override { return String::formatted("{} {} {}", family(), presentation_size(), weight()); }
+    virtual String qualified_name() const override { return String::formatted("{} {} {} {}", family(), presentation_size(), weight(), slope()); }
 
 private:
     NonnullRefPtr<TTF::Font> m_font;
diff --git a/Userland/Libraries/LibGfx/Typeface.cpp b/Userland/Libraries/LibGfx/Typeface.cpp
index 074745bdc35..f69225ec029 100644
--- a/Userland/Libraries/LibGfx/Typeface.cpp
+++ b/Userland/Libraries/LibGfx/Typeface.cpp
@@ -18,6 +18,16 @@ unsigned Typeface::weight() const
     return m_ttf_font->weight();
 }
 
+u8 Typeface::slope() const
+{
+    VERIFY(m_ttf_font || m_bitmap_fonts.size() > 0);
+
+    if (is_fixed_size())
+        return m_bitmap_fonts[0]->slope();
+
+    return m_ttf_font->slope();
+}
+
 bool Typeface::is_fixed_width() const
 {
     VERIFY(m_ttf_font || m_bitmap_fonts.size() > 0);
diff --git a/Userland/Libraries/LibGfx/Typeface.h b/Userland/Libraries/LibGfx/Typeface.h
index 818cb5a7600..631c3065805 100644
--- a/Userland/Libraries/LibGfx/Typeface.h
+++ b/Userland/Libraries/LibGfx/Typeface.h
@@ -27,6 +27,7 @@ public:
     String family() const { return m_family; }
     String variant() const { return m_variant; }
     unsigned weight() const;
+    u8 slope() const;
 
     bool is_fixed_width() const;
     bool is_fixed_size() const { return !m_bitmap_fonts.is_empty(); }
diff --git a/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp b/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
index 322c783636e..c3974a186fa 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
+++ b/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
@@ -793,13 +793,14 @@ void StyleComputer::compute_font(StyleProperties& style, DOM::Element const* ele
     FontSelector font_selector;
     bool monospace = false;
 
+    // FIXME: Implement font slope style. All found fonts are currently hard-coded as regular.
     auto find_font = [&](String const& family) -> RefPtr<Gfx::Font> {
-        font_selector = { family, size, weight };
+        font_selector = { family, size, weight, 0 };
 
         if (auto found_font = FontCache::the().get(font_selector))
             return found_font;
 
-        if (auto found_font = Gfx::FontDatabase::the().get(family, size, weight))
+        if (auto found_font = Gfx::FontDatabase::the().get(family, size, weight, 0))
             return found_font;
 
         return {};
diff --git a/Userland/Libraries/LibWeb/FontCache.h b/Userland/Libraries/LibWeb/FontCache.h
index 8f606228fe0..4dcee2d6dbd 100644
--- a/Userland/Libraries/LibWeb/FontCache.h
+++ b/Userland/Libraries/LibWeb/FontCache.h
@@ -16,10 +16,11 @@ struct FontSelector {
     FlyString family;
     int size { 0 };
     int weight { 0 };
+    int slope { 0 };
 
     bool operator==(const FontSelector& other) const
     {
-        return family == other.family && size == other.size && weight == other.weight;
+        return family == other.family && size == other.size && weight == other.weight && slope == other.slope;
     }
 };
 
diff --git a/Userland/Services/WindowServer/main.cpp b/Userland/Services/WindowServer/main.cpp
index 78ed275f296..60fcac658ae 100644
--- a/Userland/Services/WindowServer/main.cpp
+++ b/Userland/Services/WindowServer/main.cpp
@@ -41,8 +41,8 @@ ErrorOr<int> serenity_main(Main::Arguments)
     Gfx::set_system_theme(theme);
     auto palette = Gfx::PaletteImpl::create_with_anonymous_buffer(theme);
 
-    auto default_font_query = wm_config->read_entry("Fonts", "Default", "Katica 10 400");
-    auto fixed_width_font_query = wm_config->read_entry("Fonts", "FixedWidth", "Csilla 10 400");
+    auto default_font_query = wm_config->read_entry("Fonts", "Default", "Katica 10 400 0");
+    auto fixed_width_font_query = wm_config->read_entry("Fonts", "FixedWidth", "Csilla 10 400 0");
 
     Gfx::FontDatabase::set_default_font_query(default_font_query);
     Gfx::FontDatabase::set_fixed_width_font_query(fixed_width_font_query);