diff --git a/src/Str.php b/src/Str.php
index ec00505..c5a3b56 100644
--- a/src/Str.php
+++ b/src/Str.php
@@ -360,9 +360,10 @@ public static function finish($value, $cap)
      *
      * @param array|string $pattern
      * @param string $value
+     * @param bool $ignoreCase
      * @return bool
      */
-    public static function is($pattern, $value)
+    public static function is($pattern, $value, $ignoreCase = false)
     {
         $value = (string) $value;
 
@@ -389,7 +390,7 @@ public static function is($pattern, $value)
             // pattern such as "library/*", making any string check convenient.
             $pattern = str_replace('\*', '.*', $pattern);
 
-            if (preg_match('#^' . $pattern . '\z#u', $value) === 1) {
+            if (preg_match('#^' . $pattern . '\z#' . ($ignoreCase ? 'iu' : 'u'), $value) === 1) {
                 return true;
             }
         }
diff --git a/src/Stringable.php b/src/Stringable.php
index c3dccbb..5ac2f5f 100644
--- a/src/Stringable.php
+++ b/src/Stringable.php
@@ -321,11 +321,12 @@ public function finish($cap)
      * Determine if a given string matches a given pattern.
      *
      * @param string|string[] $pattern
+     * @param bool $ignoreCase
      * @return bool
      */
-    public function is($pattern)
+    public function is($pattern, $ignoreCase = false)
     {
-        return Str::is($pattern, $this->value);
+        return Str::is($pattern, $this->value, $ignoreCase);
     }
 
     /**
@@ -1070,9 +1071,9 @@ public function whenExactly($needles, $callback, $default = null)
         return $this->when($this->exactly($needles), $callback, $default);
     }
 
-    public function whenIs($pattern, $callback, $default = null)
+    public function whenIs($pattern, $callback, $default = null, $ignoreCase = false)
     {
-        return $this->when($this->is($pattern), $callback, $default);
+        return $this->when($this->is($pattern, $ignoreCase), $callback, $default);
     }
 
     public function whenIsUlid($callback, $default = null)
diff --git a/tests/StrTest.php b/tests/StrTest.php
index 70b01ba..ddad518 100644
--- a/tests/StrTest.php
+++ b/tests/StrTest.php
@@ -340,6 +340,47 @@ public function testIs()
         $this->assertFalse(Str::is('', 0));
         $this->assertFalse(Str::is([null], 0));
         $this->assertTrue(Str::is([null], null));
+
+        $this->assertTrue(Str::is('/', '/'));
+        $this->assertFalse(Str::is('/', ' /'));
+        $this->assertFalse(Str::is('/', '/a'));
+        $this->assertTrue(Str::is('foo/*', 'foo/bar/baz'));
+
+        $this->assertTrue(Str::is('*@*', 'App\Class@method'));
+        $this->assertTrue(Str::is('*@*', 'app\Class@'));
+        $this->assertTrue(Str::is('*@*', '@method'));
+
+        // is case sensitive
+        $this->assertFalse(Str::is('*BAZ*', 'foo/bar/baz'));
+        $this->assertFalse(Str::is('*FOO*', 'foo/bar/baz'));
+        $this->assertFalse(Str::is('A', 'a'));
+
+        // is not case sensitive
+        $this->assertTrue(Str::is('A', 'a', true));
+        $this->assertTrue(Str::is('*BAZ*', 'foo/bar/baz', true));
+        $this->assertTrue(Str::is(['A*', 'B*'], 'a/', true));
+        $this->assertFalse(Str::is(['A*', 'B*'], 'f/', true));
+        $this->assertTrue(Str::is('FOO', 'foo', true));
+        $this->assertTrue(Str::is('*FOO*', 'foo/bar/baz', true));
+        $this->assertTrue(Str::is('foo/*', 'FOO/bar', true));
+
+        // Accepts array of patterns
+        $this->assertTrue(Str::is(['a*', 'b*'], 'a/'));
+        $this->assertTrue(Str::is(['a*', 'b*'], 'b/'));
+        $this->assertFalse(Str::is(['a*', 'b*'], 'f/'));
+
+        // numeric values and patterns
+        $this->assertFalse(Str::is(['a*', 'b*'], 123));
+        $this->assertTrue(Str::is(['*2*', 'b*'], 11211));
+
+        $this->assertTrue(Str::is('*/foo', 'blah/baz/foo'));
+
+        // empty patterns
+        $this->assertFalse(Str::is([], 'test'));
+
+        $this->assertFalse(Str::is('', 0));
+        $this->assertFalse(Str::is([null], 0));
+        $this->assertTrue(Str::is([null], null));
     }
 
     public function testCamel()
diff --git a/tests/StringableTest.php b/tests/StringableTest.php
index e47da5e..a81b46c 100644
--- a/tests/StringableTest.php
+++ b/tests/StringableTest.php
@@ -183,6 +183,46 @@ public function testExcerpt()
         $this->assertSame('...is a beautiful morn...', (string) $this->stringable('This is a beautiful morning')->excerpt('beautiful', ['radius' => 5]));
     }
 
+    public function testIs()
+    {
+        $this->assertTrue($this->stringable('/')->is('/'));
+        $this->assertFalse($this->stringable('/')->is(' /'));
+        $this->assertFalse($this->stringable('/a')->is('/'));
+        $this->assertTrue($this->stringable('foo/bar/baz')->is('foo/*'));
+
+        $this->assertTrue($this->stringable('App\Class@method')->is('*@*'));
+        $this->assertTrue($this->stringable('app\Class@')->is('*@*'));
+        $this->assertTrue($this->stringable('@method')->is('*@*'));
+
+        // is case sensitive
+        $this->assertFalse($this->stringable('foo/bar/baz')->is('*BAZ*'));
+        $this->assertFalse($this->stringable('foo/bar/baz')->is('*FOO*'));
+        $this->assertFalse($this->stringable('a')->is('A'));
+
+        // is not case sensitive
+        $this->assertTrue($this->stringable('a')->is('A', true));
+        $this->assertTrue($this->stringable('foo/bar/baz')->is('*BAZ*', true));
+        $this->assertTrue($this->stringable('a/')->is(['A*', 'B*'], true));
+        $this->assertFalse($this->stringable('f/')->is(['A*', 'B*'], true));
+        $this->assertTrue($this->stringable('foo')->is('FOO', true));
+        $this->assertTrue($this->stringable('foo/bar/baz')->is('*FOO*', true));
+        $this->assertTrue($this->stringable('FOO/bar')->is('foo/*', true));
+
+        // Accepts array of patterns
+        $this->assertTrue($this->stringable('a/')->is(['a*', 'b*']));
+        $this->assertTrue($this->stringable('b/')->is(['a*', 'b*']));
+        $this->assertFalse($this->stringable('f/')->is(['a*', 'b*']));
+
+        // numeric values and patterns
+        $this->assertFalse($this->stringable(123)->is(['a*', 'b*']));
+        $this->assertTrue($this->stringable(11211)->is(['*2*', 'b*']));
+
+        $this->assertTrue($this->stringable('blah/baz/foo')->is('*/foo'));
+
+        // empty patterns
+        $this->assertFalse($this->stringable('test')->is([]));
+    }
+
     public function testIsAscii()
     {
         $this->assertTrue($this->stringable('Hello World!')->isAscii());