diff --git a/Base/usr/share/man/man1/pgrep.md b/Base/usr/share/man/man1/pgrep.md
index 5ce4033a51..fd1d375308 100644
--- a/Base/usr/share/man/man1/pgrep.md
+++ b/Base/usr/share/man/man1/pgrep.md
@@ -5,7 +5,7 @@ pgrep - look up processes based on name
 ## Synopsis
 
 ```sh
-$ pgrep [--count] [-d delimiter] [--ignore-case] [--list-name] [--newest] [--oldest] [--uid uid-list] [--invert-match] [--exact] <process-name>
+$ pgrep [--count] [-d delimiter] [--ignore-case] [--list-name] [--newest] [--oldest] [--older seconds] [--uid uid-list] [--invert-match] [--exact] <process-name>
 ```
 
 ## Options
@@ -16,6 +16,7 @@ $ pgrep [--count] [-d delimiter] [--ignore-case] [--list-name] [--newest] [--old
 * `-l`, `--list-name`: List the process name in addition to its pid
 * `-n`, `--newest`: Select the most recently created process only
 * `-o`, `--oldest`: Select the least recently created process only
+* `-O`, `--older`: Select only processes older than the specified number of seconds
 * `-U uid-list`, `--uid uid-list`: Select only processes whose UID is in the given comma-separated list. Login name or numerical user ID may be used
 * `-x`, `--exact`: Select only processes whose names match the given pattern exactly
 * `-v`, `--invert-match`: Select non-matching lines
diff --git a/Userland/Utilities/pgrep.cpp b/Userland/Utilities/pgrep.cpp
index 7f06b732fa..14e70d3173 100644
--- a/Userland/Utilities/pgrep.cpp
+++ b/Userland/Utilities/pgrep.cpp
@@ -30,6 +30,7 @@ ErrorOr<int> serenity_main(Main::Arguments args)
     bool exact_match = false;
     bool newest_only = false;
     bool oldest_only = false;
+    Optional<UnixDateTime> display_if_older_than;
     HashTable<uid_t> uids_to_filter_by;
     StringView pattern;
 
@@ -40,6 +41,23 @@ ErrorOr<int> serenity_main(Main::Arguments args)
     args_parser.add_option(newest_only, "Select the most recently created process only", "newest", 'n');
     args_parser.add_option(oldest_only, "Select the least recently created process only", "oldest", 'o');
     args_parser.add_option(list_process_name, "List the process name in addition to its pid", "list-name", 'l');
+    args_parser.add_option(Core::ArgsParser::Option {
+        .argument_mode = Core::ArgsParser::OptionArgumentMode::Required,
+        .help_string = "Select only processes older than the specified number of seconds",
+        .long_name = "older",
+        .short_name = 'O',
+        .value_name = "seconds",
+        .accept_value = [&display_if_older_than](StringView seconds_string) {
+            auto number = seconds_string.to_uint<u64>();
+
+            if (number.has_value() && number.value() <= NumericLimits<i64>::max()) {
+                auto now_time = UnixDateTime::now();
+                display_if_older_than = now_time - Duration::from_seconds(static_cast<i64>(number.value()));
+            }
+
+            return display_if_older_than.has_value();
+        },
+    });
     args_parser.add_option(Core::ArgsParser::Option {
         .argument_mode = Core::ArgsParser::OptionArgumentMode::Required,
         .help_string = "Select only processes whose UID is in the given comma-separated list. Login name or numerical user ID may be used",
@@ -99,6 +117,9 @@ ErrorOr<int> serenity_main(Main::Arguments args)
             if (!uids_to_filter_by.is_empty() && !uids_to_filter_by.contains(it.uid))
                 continue;
 
+            if (display_if_older_than.has_value() && it.creation_time >= display_if_older_than.value())
+                continue;
+
             matches.append(it);
         }
     }