2.2 million tweets make 'Grey's Anatomy' most buzzed TV show

Medical drama series Grey's Anatomy has emerged as the most buzzed TV show on micro-blogging Twitter.

According to Twitter, which looked at tweets from June 1 to September 14, 21 million tweets have been logged about fall TV debuts (up by 34% from last year) with 90% of that conversation revolving around returning shows, was reported.

The most buzzed about fall TV show was Shonda Rhimes' Grey's Anatomy, which racked in 2.2 million tweets in its 11th season, likely the result of Dr McDreamy's (Patrick Dempsey) abrupt departure from the show. The show ranked 6th in 2014.

Read: 'Grey's Anatomy' fans will never see Katherine Heigl return to show

Grey's Anatomy was followed by Supernatural (2 million), The Walking Dead (1.9 million), The Vampire Diaries (1.6 million), and Once Upon a Time (1.1 million).

Rhimes' other ABC hit How to Get Away With Murder, which is returning for its second season, surged 276% in buzz from 2014.

The drama followed The Flash and Jane the Virgin in the top three list of shows that have had the highest year over year growth in conversation. 

New shows that have garnered the most excitement from Twitter users include American Horror Story: Hotel, Scream Queens, The Late Show, Heroes Reborn and Supergirl.