Planning: Actors, Costume & Props

Actors
We have decided on three actors for our opening, two females and one male. These were based on preferences we'd set and we managed to roughly meet these. 
James Cox is one of the first people we'd picked as he was available and he also fitted the character profile we'd thought up. A young version of Mark Ruffalo is roughly the character we were looking for as this actor in particular is featured in a lot of thriller films and he has a good look, we wanted a younger representation of him because the plot is based on a group of teenagers. James is one of the only people we came across that looked fairly similar to this actor and he also proved to be a considerably good actor; he will be the second 'victim' in our thriller.
Secondly is one of the females we chose, Hannah Woodward, who fit the preference of being slightly tall and blonde, we didn't chose a specific actor/actress for her to be based on because we wanted this character to be slightly more original. Hannah is chosen to be the first 'victim' in our thriller when exploring.
Georgia Gray is the last person we chose as she was perfect for the role of a short girl, again we didn't base her on a celebrity actor profile because it wasn't necessary. Georgia is left to be the last one standing in the opening sequence, she's perfect for this as she's very petite and fragile looking so she'll appear as a being extremely vulnerable and unguarded when she doesn't have her friends around her as protection.

Costume & Props
For the costume there isn't anything in particular we want the actors to wear as we just want it to appear as a standard day when they stumble upon the abandoned building so we've requested that they all wear their own clothes that they would on a normal day, we want to keep the attire completely casual.
As for props we actually don't need to take anything with us we can use the features of the location to build character, one thing in particular that we liked a lot is a half broken barn door that, when we visited during location scouting, was swinging in the wind which looked amazing and brought a real eerie atmosphere, so we'd really like to include this in some part of the thriller. In addition to this there was a set of decomposing swinging doors that had graffiti on that we're going to have as the first thing the group notice when they get into the abandoned area.