The actress will be back on screen as mischief-making Theresa McQueen later this year.
The character is currently in prison after confessing to the police that she fatally shot Calvin Valentine in 2010.
Theresa spent several years evading responsibility for the shooting before finally coming clean earlier this year.
“I am excited to be returning. Theresa is awaiting trial but has some serious unfinished business before then so I am thrilled to be able to come back and finish what we started.” – Jorgie Porter
A spokesperson for the show added “Theresa is on a mission and she’s got a secret that’s going to shock a lot of people around the village.”
Porter chose to leave Hollyoaks last year after five years to focus on the recent All Stars series of Dancing On Ice; however she became the first celebrity to be eliminated from the competition.
Hollyoaks airs weeknights at 6.30pm on Channel 4, with a first look screening at 7.00pm on E4. Viewers can also catch up on demand at http://www.channel4.com/programmes/4od