Twitter co-founders Evan Williams (L) and Jack Dorsey (C) walk together during the Twitter Inc. IPO on the floor of the New York Stock Exchange in New York, November 7, 2013.
Twitter co-founder Evan Williams' Twitter account was hacked by OurMine. Following the series of breaches exposing user ids and password from Tumblr, LinkedIn and MySpace; Twitter, Facebook and Netflix are asking users to reset their passwords. Twitter co-founders Evan Williams (L) and Jack Dorsey (C) walk together during the Twitter Inc. IPO on the floor of the New York Stock Exchange in New York, November 7, 2013.Reuters File

After hacking into Facebook CEO Mark Zuckerberg's Twitter and Pinterest accounts, hacker group OurMine has struck again on Twitter and this time they've struck close to home. The group managed to hack into Twitter co-founder Evan Williams' account.

Williams joins Katy Perry, Lana Del Rey and Drake, whose accounts have also been hacked of late. OurMine also claimed responsibility for hacking into EDM artist Deadmau5's account as well.

Mashable reported that the former Twitter CEO's account was hacked on Wednesday before access was regained. The hacker group had left their signature Tweet claiming to test users' security.

The report added that the group had gained access to William's account through Foursquare.

Despite having denied reports that users account details were stolen in a breach, Twitter is reportedly sending notifications to users asking them to reset their accounts in order to resume using them.

The company took to its official blog to reassure users that there hasn't been an active breach on their part, but notes that accounts have nevertheless been affected.

Read more: How not to get your password hacked like Zuckerberg

"In situations where your password has been directly exposed, you are sent a password reset notification; your account is protected until the owner of the email or phone number resets the password," noted Twitter's Michael Coates, Trust and Information Security Officer in the blog post.

The microblogging platform told the Wall Street Journal that it has notified a millions of users.

Facebook and Netflix are also reportedly asking users to reset their passwords following the breaches that have taken place off late. LinkedIn, Tumblr and MySpace have all be reported to be hacked and user ids and passwords being exposed.

Brian Krebs on Krebs on Security noted on Monday that Netflix had sent him a notification asking him to reset his account password. Krebs said that if users had used the same passwords on their LinkedIn, MySpace and Tumblr accounts, then chances are Facebook and Neflix would temporarily suspend their accounts, asking them to reset their passwords. He said "big companies" like Netflix and Facebook, regularly sift through data breaches and cross refer credentials shared with the information stored with them.

Fortune also reported that Facebook has also been contacting affected users, asking them to reset their passwords.