The actor’s costumes
would need to be party attire.
Charlie’s character is meticulous and fashionably well dressed. A white shirt, blue sweater, black skinny jeans and black leather shoes would display that well. So that the protagonist would stick out against the crowd, a yellow coat may also be added in the beginning scenes.
The character of Miles’ is relaxed and casual, so should his clothing. A
grey t-shirt and denim skinny jeans, complete with a blue hoodie should
suffice, along with a pair of converse shoes as well.
The character of Steph is not usually dressed very girly, however she is trying to impress Miles at the party. A patterned red dress or skirt with brown boots should express her character.