Guinness World Records can today confirm that Caitlyn Jenner, formerly known as Bruce Jenner, has shattered the record for fastest time to reach one million followers on Twitter.
The reality star and former Olympic athlete’s new verified account @Caitlyn_Jenner reached the figure in just 4 hours and 3 minutes.

Caitlyn Jenner made her debut Monday in photos that will appear in the July issue of Vanity Fair and celebrated the occasion with the unveiling of her own Twitter account.
Sending her first Tweet Monday morning at 12:17 a.m. EST — a reveal of her Vanity Fair cover— Jenner reached 1 million followers at 4:20 PM EST.
POTUS first tweet
Caitlyn's surge towards the record was helped in no small part by supporters and well-wishers using the hashtag #CallMeCaitlyn which rapidly began to trend after Caitlyn's Twitter account went live.   
The social media achievement comes just two weeks after President Obama’s new Twitter account @POTUS broke the previous record, amassing one million followers in 4 hours and 52 minutes, on Monday, May 18th.
Prior to Obama, the record was held by Ironman star Robert Downey Jr., who reached 1 million followers in 23 hours and 22 minutes in April 2014. 

Robert Downey Jr. Twitter record
Downey Jr.'s Twitter debut was recognised in the 2015 edition of the Guinness World Records book.
Bruce Jenner 1976 Decathlon world record book entry
Jenner's record as it appeared in the 1976 edition of the Guinness Book of Records
Jenner is no stranger to the world of record breaking, having set the world record for most points in a decathlon (male) on three occasions during the mid-1970s, the third a time at the Montreal Olympics in 1976 with a final score of 8,618.
The record stood for four years until it was eventually beaten by Great Britain's Daley Thompson in Götzis, Austria.