Feature currently only available for Pages on social network
According to ZDNet, the function, which makes up part of the new Subscriptions feature that also allows users to follow the public updates of Facebook members who are not your friends including artists, journalists and other public figures, the roll-out of the feature looks set to begin soon.
In an update to Facebook's Subscribe for Public Figures document, the social network says "soon you'll be able to update your Twitter account directly from Facebook".
To get started the social network advises members to go to Facebook's dedicated page for Twitter and then you'll be able to Link your Facebook page to a specific Twitter account. At present, it's only available for Pages on Facebook that businesses can create. However, it will soon be extended to all profiles on the social networking site.
Facebook also warned that only posts given the privacy setting of Public (ie they can be viewed by anyone) will be eligible to be shared on Twitter.
Twitter already offers the function that allows tweets to be posted direct to a user's Facebook account for some time.