A statement on Hibernian's official website has confirmed that they have completed the signing of Fraser Mullen on a one-year contract.
The 19-year-old, who left Hearts earlier this summer, becomes the club's fourth signing in this transfer window.
"Hibernian can confirm the club has signed defender Fraser Mullen on a one-year contract," read the statement.
"A former Scotland under-17 internationalist, right-back Mullen, 19, agreed the deal on Saturday morning and has become the club's fourth arrival during the summer transfer window."
A number of English clubs had been linked with his services.
