diff --git a/clang/docs/ClangFormatStyleOptions.rst b/clang/docs/ClangFormatStyleOptions.rst
--- a/clang/docs/ClangFormatStyleOptions.rst
+++ b/clang/docs/ClangFormatStyleOptions.rst
@@ -1241,6 +1241,21 @@
 
 
 
+**AlwaysBreakBeforeFunctionParameters** (``Boolean``) :versionbadge:`clang-format 15.0`
+  If ``true``, always break before function parameters.
+
+  This flag is meant to align function parameters starting on the line following
+  a function declaration or definition. Thus, it will only take effect if a function
+  declares a parameter (or multiple parameters).
+
+  .. code-block:: c++
+
+     true:                                  false:
+     int                            vs.     int
+     add_two_numbers(                       add_two_numbers(int a,
+         int a,                                             int b);
+         int b);
+
 **AlwaysBreakBeforeMultilineStrings** (``Boolean``) :versionbadge:`clang-format 3.4`
   If ``true``, always break before multiline string literals.
 
diff --git a/clang/include/clang/Format/Format.h b/clang/include/clang/Format/Format.h
--- a/clang/include/clang/Format/Format.h
+++ b/clang/include/clang/Format/Format.h
@@ -749,6 +749,14 @@
   /// \version 3.4
   bool AlwaysBreakBeforeMultilineStrings;
 
+  /// \brief Always break before function parameters in a declaration, e.g.:
+  /// \code
+  ///   someFunction(
+  ///       int argument1,
+  ///       int argument2);
+  /// \endcode
+  bool AlwaysBreakBeforeFunctionParameters;
+
   /// Different ways to break after the template declaration.
   enum BreakTemplateDeclarationsStyle : int8_t {
     /// Do not force break before declaration.
diff --git a/clang/lib/Format/ContinuationIndenter.cpp b/clang/lib/Format/ContinuationIndenter.cpp
--- a/clang/lib/Format/ContinuationIndenter.cpp
+++ b/clang/lib/Format/ContinuationIndenter.cpp
@@ -335,6 +335,11 @@
     auto LambdaBodyLength = getLengthToMatchingParen(Current, State.Stack);
     return LambdaBodyLength > getColumnLimit(State);
   }
+  // Check if we want to break before function parameters in declarations
+  if (startsNextParameter(Current, Style) &&
+      Style.AlwaysBreakBeforeFunctionParameters &&
+      State.Line->MustBeDeclaration)
+    return true;
   if (Current.MustBreakBefore || Current.is(TT_InlineASMColon))
     return true;
   if (CurrentState.BreakBeforeClosingBrace &&
@@ -983,7 +988,9 @@
     // If we are breaking after '(', '{', '<', or this is the break after a ':'
     // to start a member initializater list in a constructor, this should not
     // be considered bin packing unless the relevant AllowAll option is false or
-    // this is a dict/object literal.
+    // this is a dict/object literal. Break if
+    // AlwaysBreakBeforeFunctionParameters is true and it's a function
+    // declaration.
     bool PreviousIsBreakingCtorInitializerColon =
         Previous.is(TT_CtorInitializerColon) &&
         Style.BreakConstructorInitializers == FormatStyle::BCIS_AfterColon;
@@ -995,7 +1002,9 @@
          !State.Line->MustBeDeclaration) ||
         (Style.PackConstructorInitializers != FormatStyle::PCIS_NextLine &&
          PreviousIsBreakingCtorInitializerColon) ||
-        Previous.is(TT_DictLiteral))
+        Previous.is(TT_DictLiteral) ||
+        (Style.AlwaysBreakBeforeFunctionParameters &&
+         State.Line->MustBeDeclaration))
       CurrentState.BreakBeforeParameter = true;
 
     // If we are breaking after a ':' to start a member initializer list,
diff --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
--- a/clang/lib/Format/Format.cpp
+++ b/clang/lib/Format/Format.cpp
@@ -685,6 +685,8 @@
 
     IO.mapOptional("AlwaysBreakBeforeMultilineStrings",
                    Style.AlwaysBreakBeforeMultilineStrings);
+    IO.mapOptional("AlwaysBreakBeforeFunctionParameters",
+                   Style.AlwaysBreakBeforeFunctionParameters);
     IO.mapOptional("AlwaysBreakTemplateDeclarations",
                    Style.AlwaysBreakTemplateDeclarations);
     IO.mapOptional("AttributeMacros", Style.AttributeMacros);
@@ -1367,6 +1369,7 @@
       FormatStyle::SIS_WithoutElse;
   GoogleStyle.AllowShortLoopsOnASingleLine = true;
   GoogleStyle.AlwaysBreakBeforeMultilineStrings = true;
+  GoogleStyle.AlwaysBreakBeforeFunctionParameters = false;
   GoogleStyle.AlwaysBreakTemplateDeclarations = FormatStyle::BTDS_Yes;
   GoogleStyle.DerivePointerAlignment = true;
   GoogleStyle.IncludeStyle.IncludeCategories = {{"^<ext/.*\\.h>", 2, 0, false},
@@ -1438,6 +1441,7 @@
     GoogleStyle.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Empty;
     GoogleStyle.AllowShortIfStatementsOnASingleLine = FormatStyle::SIS_Never;
     GoogleStyle.AlwaysBreakBeforeMultilineStrings = false;
+    GoogleStyle.AlwaysBreakBeforeFunctionParameters = false;
     GoogleStyle.BreakBeforeBinaryOperators = FormatStyle::BOS_NonAssignment;
     GoogleStyle.ColumnLimit = 100;
     GoogleStyle.SpaceAfterCStyleCast = true;
@@ -1449,6 +1453,7 @@
     // TODO: still under discussion whether to switch to SLS_All.
     GoogleStyle.AllowShortLambdasOnASingleLine = FormatStyle::SLS_Empty;
     GoogleStyle.AlwaysBreakBeforeMultilineStrings = false;
+    GoogleStyle.AlwaysBreakBeforeFunctionParameters = false;
     GoogleStyle.BreakBeforeTernaryOperators = false;
     // taze:, triple slash directives (`/// <...`), tslint:, and @see, which is
     // commonly followed by overlong URLs.
diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -4042,6 +4042,18 @@
       return true;
   }
 
+  // If AlwaysBreakBeforeFunctionParameters is true, we want to break before
+  // the next parameter, if there is one.
+  if (Left.is(tok::l_paren) && Style.AlwaysBreakBeforeFunctionParameters &&
+      !Right.is(tok::r_paren)) {
+    if (Left.Previous) {
+      const FormatToken &TwoPrevious = *Left.Previous;
+      if (TwoPrevious.is(TT_FunctionDeclarationName)) {
+        return true;
+      }
+    }
+  }
+
   // If the last token before a '}', ']', or ')' is a comma or a trailing
   // comment, the intention is to insert a line break after it in order to make
   // shuffling around entries easier. Import statements, especially in