diff --git a/changelogs/fragments/7930.yml b/changelogs/fragments/7930.yml
new file mode 100644
index 000000000000..ce3a0c638262
--- /dev/null
+++ b/changelogs/fragments/7930.yml
@@ -0,0 +1,2 @@
+fix:
+- Show alias fields in Discover tab ([#7930](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/7930))
\ No newline at end of file
diff --git a/src/plugins/data/common/constants.ts b/src/plugins/data/common/constants.ts
index 289d56d4d064..199391630b25 100644
--- a/src/plugins/data/common/constants.ts
+++ b/src/plugins/data/common/constants.ts
@@ -86,6 +86,7 @@ export const UI_SETTINGS = {
   COURIER_BATCH_SEARCHES: 'courier:batchSearches',
   SEARCH_INCLUDE_FROZEN: 'search:includeFrozen',
   SEARCH_TIMEOUT: 'search:timeout',
+  SEARCH_INCLUDE_ALL_FIELDS: 'search:includeAllFields',
   HISTOGRAM_BAR_TARGET: 'histogram:barTarget',
   HISTOGRAM_MAX_BARS: 'histogram:maxBars',
   HISTORY_LIMIT: 'history:limit',
diff --git a/src/plugins/data/common/search/search_source/search_source.ts b/src/plugins/data/common/search/search_source/search_source.ts
index c8eb99b038a7..6a2eee0162b5 100644
--- a/src/plugins/data/common/search/search_source/search_source.ts
+++ b/src/plugins/data/common/search/search_source/search_source.ts
@@ -131,6 +131,7 @@ export const searchSourceRequiredUiSettings = [
   UI_SETTINGS.SEARCH_INCLUDE_FROZEN,
   UI_SETTINGS.SORT_OPTIONS,
   UI_SETTINGS.QUERY_DATAFRAME_HYDRATION_STRATEGY,
+  UI_SETTINGS.SEARCH_INCLUDE_ALL_FIELDS,
 ];
 
 export interface SearchSourceDependencies extends FetchHandlers {
@@ -586,6 +587,7 @@ export class SearchSource {
 
   flatten() {
     const searchRequest = this.mergeProps();
+    const { getConfig } = this.dependencies;
 
     searchRequest.body = searchRequest.body || {};
     const { body, index, fields, query, filters, highlightAll } = searchRequest;
@@ -595,6 +597,9 @@ export class SearchSource {
 
     body.stored_fields = computedFields.storedFields;
     body.script_fields = body.script_fields || {};
+    if (getConfig(UI_SETTINGS.SEARCH_INCLUDE_ALL_FIELDS)) {
+      body.fields = ['*'];
+    }
     extend(body.script_fields, computedFields.scriptFields);
 
     const defaultDocValueFields = computedFields.docvalueFields
@@ -606,8 +611,6 @@ export class SearchSource {
       body._source = index.getSourceFiltering();
     }
 
-    const { getConfig } = this.dependencies;
-
     if (body._source) {
       // exclude source fields for this index pattern specified by the user
       const filter = fieldWildcardFilter(body._source.excludes, getConfig(UI_SETTINGS.META_FIELDS));
diff --git a/src/plugins/data/server/ui_settings.ts b/src/plugins/data/server/ui_settings.ts
index 79cf50a900b9..4cee0a9894dd 100644
--- a/src/plugins/data/server/ui_settings.ts
+++ b/src/plugins/data/server/ui_settings.ts
@@ -762,5 +762,18 @@ export function getUiSettings(): Record<string, UiSettingsParams<unknown>> {
       }),
       schema: schema.arrayOf(schema.string()),
     },
+    [UI_SETTINGS.SEARCH_INCLUDE_ALL_FIELDS]: {
+      name: i18n.translate('data.advancedSettings.searchIncludeAllFieldsTitle', {
+        defaultMessage: 'Include all fields in search request',
+      }),
+      value: false,
+      description: i18n.translate('data.advancedSettings.searchIncludeAllFieldsText', {
+        defaultMessage: `
+        <strong>Experimental</strong>:
+        Adds the <code>"fields": ["*"]</code> property to search request body`,
+      }),
+      schema: schema.boolean(),
+      category: ['search'],
+    },
   };
 }