diff --git a/lib/XRay/Formats/Twitter.php b/lib/XRay/Formats/Twitter.php
index 9be9a42..f4e0dc8 100644
--- a/lib/XRay/Formats/Twitter.php
+++ b/lib/XRay/Formats/Twitter.php
@@ -108,6 +108,13 @@ class Twitter extends Format {
       }
     }
 
+    // In-Reply-To
+    if(property_exists($tweet, 'in_reply_to_status_id_str') && $tweet->in_reply_to_status_id_str) {
+      $entry['in-reply-to'] = [
+        'https://twitter.com/'.$tweet->in_reply_to_screen_name.'/status/'.$tweet->in_reply_to_status_id_str
+      ];
+    }
+
     // Don't include the RT'd photo or video in the main object.
     // They get included in the reposted object instead.
     if(!property_exists($tweet, 'retweeted_status')) {
diff --git a/tests/TwitterTest.php b/tests/TwitterTest.php
index 1814a08..3f904a9 100644
--- a/tests/TwitterTest.php
+++ b/tests/TwitterTest.php
@@ -244,4 +244,18 @@ Feel like I could (maybe) rewrite previous open code to do some of this :)', $da
 Woke up this morning feeling compelled to run to Corona… http://tantek.com/2018/049/t3/rainbow-at-sunrise", $data['data']['content']['text']);
   }
 
+  public function testStreamingTweetReply() {
+    list($url, $json) = $this->loadTweet('streaming-tweet-reply');
+    $data = $this->parse(['url' => $url, 'body' => $json]);
+
+    $this->assertEquals('https://twitter.com/anomalily/status/967024586423386112', $data['data']['in-reply-to'][0]);
+  }
+
+  public function testTweetReply() {
+    list($url, $json) = $this->loadTweet('967046438822674432');
+    $data = $this->parse(['url' => $url, 'body' => $json]);
+
+    $this->assertEquals('https://twitter.com/anomalily/status/967024586423386112', $data['data']['in-reply-to'][0]);
+  }
+
 }
diff --git a/tests/data/api.twitter.com/967046438822674432.json b/tests/data/api.twitter.com/967046438822674432.json
new file mode 100644
index 0000000..cdc830c
--- /dev/null
+++ b/tests/data/api.twitter.com/967046438822674432.json
@@ -0,0 +1,120 @@
+{
+  "created_at": "Fri Feb 23 14:40:12 +0000 2018",
+  "id": 967046438822674432,
+  "id_str": "967046438822674432",
+  "full_text": "@anomalily @i_stan4u @borrowtheair It’d be SO BORING if they just skated until they did big jumps and there was no artistry.",
+  "truncated": false,
+  "display_text_range": [
+    35,
+    124
+  ],
+  "entities": {
+    "hashtags": [
+
+    ],
+    "symbols": [
+
+    ],
+    "user_mentions": [
+      {
+        "screen_name": "anomalily",
+        "name": "Lillian Karabaic (book out 4/17!)",
+        "id": 46416755,
+        "id_str": "46416755",
+        "indices": [
+          0,
+          10
+        ]
+      },
+      {
+        "screen_name": "i_stan4u",
+        "name": "iStan",
+        "id": 947754749964591104,
+        "id_str": "947754749964591104",
+        "indices": [
+          11,
+          20
+        ]
+      },
+      {
+        "screen_name": "borrowtheair",
+        "name": "to be honest",
+        "id": 932418774384254977,
+        "id_str": "932418774384254977",
+        "indices": [
+          21,
+          34
+        ]
+      }
+    ],
+    "urls": [
+
+    ]
+  },
+  "source": "<a href=\"http://twitter.com/download/iphone\" rel=\"nofollow\">Twitter for iPhone</a>",
+  "in_reply_to_status_id": 967024586423386112,
+  "in_reply_to_status_id_str": "967024586423386112",
+  "in_reply_to_user_id": 46416755,
+  "in_reply_to_user_id_str": "46416755",
+  "in_reply_to_screen_name": "anomalily",
+  "user": {
+    "id": 349298514,
+    "id_str": "349298514",
+    "name": "Maggie Williams",
+    "screen_name": "pdxmaggie",
+    "location": "Portland, OR",
+    "description": "Prodigal daughter returns to Portland to find she's now constantly overdressed for her hometown.",
+    "url": null,
+    "entities": {
+      "description": {
+        "urls": [
+
+        ]
+      }
+    },
+    "protected": false,
+    "followers_count": 441,
+    "friends_count": 309,
+    "listed_count": 18,
+    "created_at": "Fri Aug 05 21:54:05 +0000 2011",
+    "favourites_count": 2761,
+    "utc_offset": -18000,
+    "time_zone": "Eastern Time (US & Canada)",
+    "geo_enabled": true,
+    "verified": false,
+    "statuses_count": 7256,
+    "lang": "en",
+    "contributors_enabled": false,
+    "is_translator": false,
+    "is_translation_enabled": false,
+    "profile_background_color": "C0DEED",
+    "profile_background_image_url": "http://abs.twimg.com/images/themes/theme1/bg.png",
+    "profile_background_image_url_https": "https://abs.twimg.com/images/themes/theme1/bg.png",
+    "profile_background_tile": false,
+    "profile_image_url": "http://pbs.twimg.com/profile_images/875413860257103872/mz3WUmK3_normal.jpg",
+    "profile_image_url_https": "https://pbs.twimg.com/profile_images/875413860257103872/mz3WUmK3_normal.jpg",
+    "profile_banner_url": "https://pbs.twimg.com/profile_banners/349298514/1449637782",
+    "profile_link_color": "1DA1F2",
+    "profile_sidebar_border_color": "C0DEED",
+    "profile_sidebar_fill_color": "DDEEF6",
+    "profile_text_color": "333333",
+    "profile_use_background_image": true,
+    "has_extended_profile": true,
+    "default_profile": true,
+    "default_profile_image": false,
+    "following": false,
+    "follow_request_sent": false,
+    "notifications": false,
+    "translator_type": "none"
+  },
+  "geo": null,
+  "coordinates": null,
+  "place": null,
+  "contributors": null,
+  "is_quote_status": false,
+  "retweet_count": 0,
+  "favorite_count": 1,
+  "favorited": false,
+  "retweeted": false,
+  "lang": "en"
+}
\ No newline at end of file
diff --git a/tests/data/api.twitter.com/streaming-tweet-reply.json b/tests/data/api.twitter.com/streaming-tweet-reply.json
new file mode 100644
index 0000000..9e2c0e4
--- /dev/null
+++ b/tests/data/api.twitter.com/streaming-tweet-reply.json
@@ -0,0 +1,110 @@
+
+{
+    "created_at": "Fri Feb 23 14:40:12 +0000 2018",
+    "id": 967046438822674432,
+    "id_str": "967046438822674432",
+    "text": "@anomalily @i_stan4u @borrowtheair It\u2019d be SO BORING if they just skated until they did big jumps and there was no artistry.",
+    "display_text_range": [
+        35,
+        124
+    ],
+    "source": "<a href=\"http://twitter.com/download/iphone\" rel=\"nofollow\">Twitter for iPhone</a>",
+    "truncated": false,
+    "in_reply_to_status_id": 967024586423386112,
+    "in_reply_to_status_id_str": "967024586423386112",
+    "in_reply_to_user_id": 46416755,
+    "in_reply_to_user_id_str": "46416755",
+    "in_reply_to_screen_name": "anomalily",
+    "user": {
+        "id": 349298514,
+        "id_str": "349298514",
+        "name": "Maggie Williams",
+        "screen_name": "pdxmaggie",
+        "location": "Portland, OR",
+        "url": null,
+        "description": "Prodigal daughter returns to Portland to find she's now constantly overdressed for her hometown.",
+        "translator_type": "none",
+        "protected": false,
+        "verified": false,
+        "followers_count": 441,
+        "friends_count": 309,
+        "listed_count": 18,
+        "favourites_count": 2758,
+        "statuses_count": 7249,
+        "created_at": "Fri Aug 05 21:54:05 +0000 2011",
+        "utc_offset": -18000,
+        "time_zone": "Eastern Time (US & Canada)",
+        "geo_enabled": true,
+        "lang": "en",
+        "contributors_enabled": false,
+        "is_translator": false,
+        "profile_background_color": "C0DEED",
+        "profile_background_image_url": "http://abs.twimg.com/images/themes/theme1/bg.png",
+        "profile_background_image_url_https": "https://abs.twimg.com/images/themes/theme1/bg.png",
+        "profile_background_tile": false,
+        "profile_link_color": "1DA1F2",
+        "profile_sidebar_border_color": "C0DEED",
+        "profile_sidebar_fill_color": "DDEEF6",
+        "profile_text_color": "333333",
+        "profile_use_background_image": true,
+        "profile_image_url": "http://pbs.twimg.com/profile_images/875413860257103872/mz3WUmK3_normal.jpg",
+        "profile_image_url_https": "https://pbs.twimg.com/profile_images/875413860257103872/mz3WUmK3_normal.jpg",
+        "profile_banner_url": "https://pbs.twimg.com/profile_banners/349298514/1449637782",
+        "default_profile": true,
+        "default_profile_image": false,
+        "following": null,
+        "follow_request_sent": null,
+        "notifications": null
+    },
+    "geo": null,
+    "coordinates": null,
+    "place": null,
+    "contributors": null,
+    "is_quote_status": false,
+    "quote_count": 0,
+    "reply_count": 0,
+    "retweet_count": 0,
+    "favorite_count": 0,
+    "entities": {
+        "hashtags": [],
+        "urls": [],
+        "user_mentions": [
+            {
+                "screen_name": "anomalily",
+                "name": "Lillian Karabaic (book out 4/17!)",
+                "id": 46416755,
+                "id_str": "46416755",
+                "indices": [
+                    0,
+                    10
+                ]
+            },
+            {
+                "screen_name": "i_stan4u",
+                "name": "iStan",
+                "id": 947754749964591104,
+                "id_str": "947754749964591104",
+                "indices": [
+                    11,
+                    20
+                ]
+            },
+            {
+                "screen_name": "borrowtheair",
+                "name": "to be honest",
+                "id": 932418774384254977,
+                "id_str": "932418774384254977",
+                "indices": [
+                    21,
+                    34
+                ]
+            }
+        ],
+        "symbols": []
+    },
+    "favorited": false,
+    "retweeted": false,
+    "filter_level": "low",
+    "lang": "en",
+    "timestamp_ms": "1519396812526"
+}