Back in February, show bosses confirmed that Texas will be killed on her wedding day in a dramatic episode due to air in a few weeks' time.
Texas (Bianca Hendrickse-Spendlove) is currently planning to marry Will Savage (James Atherton), unaware that he has been manipulating her for months.
Leanne becomes involved in the storyline next week as she begins to develop romantic feelings for Will, which could lead to her becoming jealous of best friend Texas.
Forrest told Digital Spy of the upcoming scenes: "There's loads of stuff coming up, just keep tuning in! The storyline starts next week and then it runs for a few months. It's so exciting and there's so many twists and turns.
"We've already filmed the wedding, and the big day is amazing. When we filmed it, it was absolutely beautiful and we had big crane cameras shooting some of the scenes. I think it's going to look amazing - Hollyoaks at its best!"
The storyline builds up to Texas being pushed from a window and falling to her death at the wedding, leaving fans to wonder who is responsible for the terrible crime.
Asked whether Leanne will be under suspicion, Forrest replied: "Yes, she's definitely one of the suspects! There are five suspects and Leanne is one of them, unfortunately!"
Hollyoaks airs weeknights at 6.30pm on Channel 4, with first look screenings at 7pm on E4.
Check back later today for our full interview with Hollyoaks actress Jessica Forrest.
Digital Spy Soap Scoop - press play below to watch Amie Parker-Williams reveal gossip on weddings in EastEnders and Emmerdale, a funeral in Coronation Street and sinister behaviour in Hollyoaks.
http://www.digitalspy.co.uk/soaps/s13/hollyoaks/news/a470904/hollyoaks-leanne-holiday-to-be-murder-suspect.html
