diff --git a/src/wp-includes/class-wp-query.php b/src/wp-includes/class-wp-query.php
index 975d1318a5..d30bc43f34 100644
--- a/src/wp-includes/class-wp-query.php
+++ b/src/wp-includes/class-wp-query.php
@@ -3563,16 +3563,22 @@ class WP_Query {
 
 		if ( $this->is_category || $this->is_tag || $this->is_tax ) {
 			if ( $this->is_category ) {
-				if ( $this->get( 'cat' ) ) {
-					$term = get_term( $this->get( 'cat' ), 'category' );
-				} elseif ( $this->get( 'category_name' ) ) {
-					$term = get_term_by( 'slug', $this->get( 'category_name' ), 'category' );
+				$cat           = $this->get( 'cat' );
+				$category_name = $this->get( 'category_name' );
+
+				if ( $cat ) {
+					$term = get_term( $cat, 'category' );
+				} elseif ( $category_name ) {
+					$term = get_term_by( 'slug', $category_name, 'category' );
 				}
 			} elseif ( $this->is_tag ) {
-				if ( $this->get( 'tag_id' ) ) {
-					$term = get_term( $this->get( 'tag_id' ), 'post_tag' );
-				} elseif ( $this->get( 'tag' ) ) {
-					$term = get_term_by( 'slug', $this->get( 'tag' ), 'post_tag' );
+				$tag_id = $this->get( 'tag_id' );
+				$tag    = $this->get( 'tag' );
+
+				if ( $tag_id ) {
+					$term = get_term( $tag_id, 'post_tag' );
+				} elseif ( $tag ) {
+					$term = get_term_by( 'slug', $tag, 'post_tag' );
 				}
 			} else {
 				// For other tax queries, grab the first term from the first clause.
@@ -3601,20 +3607,35 @@ class WP_Query {
 			}
 		} elseif ( $this->is_post_type_archive ) {
 			$post_type = $this->get( 'post_type' );
+
 			if ( is_array( $post_type ) ) {
 				$post_type = reset( $post_type );
 			}
+
 			$this->queried_object = get_post_type_object( $post_type );
 		} elseif ( $this->is_posts_page ) {
-			$page_for_posts          = get_option( 'page_for_posts' );
+			$page_for_posts = get_option( 'page_for_posts' );
+
 			$this->queried_object    = get_post( $page_for_posts );
 			$this->queried_object_id = (int) $this->queried_object->ID;
 		} elseif ( $this->is_singular && ! empty( $this->post ) ) {
 			$this->queried_object    = $this->post;
 			$this->queried_object_id = (int) $this->post->ID;
 		} elseif ( $this->is_author ) {
-			$this->queried_object_id = (int) $this->get( 'author' );
-			$this->queried_object    = get_userdata( $this->queried_object_id );
+			$author      = (int) $this->get( 'author' );
+			$author_name = $this->get( 'author_name' );
+
+			if ( $author ) {
+				$this->queried_object_id = $author;
+			} elseif ( $author_name ) {
+				$user = get_user_by( 'slug', $author_name );
+
+				if ( $user ) {
+					$this->queried_object_id = $user->ID;
+				}
+			}
+
+			$this->queried_object = get_userdata( $this->queried_object_id );
 		}
 
 		return $this->queried_object;
diff --git a/tests/phpunit/tests/query.php b/tests/phpunit/tests/query.php
index 8dfd3fb200..c0ce7357a4 100644
--- a/tests/phpunit/tests/query.php
+++ b/tests/phpunit/tests/query.php
@@ -696,4 +696,27 @@ class Tests_Query extends WP_UnitTestCase {
 		$this->assertSame( 'tax1', get_query_var( 'taxonomy' ) );
 		$this->assertSame( 'term1', get_query_var( 'term' ) );
 	}
+
+	/**
+	 * @ticket 55100
+	 */
+	public function test_get_queried_object_should_work_for_author_name_before_get_posts() {
+		$user_id = self::factory()->user->create();
+		$user    = get_user_by( 'ID', $user_id );
+		$post_id = self::factory()->post->create(
+			array(
+				'post_author' => $user_id,
+			)
+		);
+
+		$this->go_to( home_url( '?author=' . $user_id ) );
+
+		$this->assertInstanceOf( 'WP_User', get_queried_object() );
+		$this->assertSame( get_queried_object_id(), $user_id );
+
+		$this->go_to( home_url( '?author_name=' . $user->user_nicename ) );
+
+		$this->assertInstanceOf( 'WP_User', get_queried_object() );
+		$this->assertSame( get_queried_object_id(), $user_id );
+	}
 }