Selena Gomez on season four of "Only Murders in the Building."Patrick Harbron/DisneySelena Gomez said she has a "tactic" for getting into auditions if casting directors don't think she's a fit.The actor told THR that she doesn't tell them in advance that she's auditioning.Gomez said this has been "the biggest challenge that I've faced as an actor."Selena Gomez has been acting since she was a child and is one of the most recognizable stars to break out of Disney Channel into mainstream success — but she still has to fight to get into audition rooms and prove herself."If they think I'm too young for a part, or whatever the case may be, we use a tactic where we don't tell them it's me auditioning so that they just have to accept me auditioning," Gomez said in a new interview with The Hollywood Reporter, released Wednesday.Gomez said that sometimes when casting directors learn that she wants to audition, they tell her that she's not fit for the project before she's even read for the part.