How do u take incehs off your waist?

hi i am a 15 yr old girl who wants to be a actress and has to loose some weight not alot but some i just have a problem i have been running for almost 6 months stright like 3-5 times a week for 2 hrs non stop i usually jog and i wont stop but i havnt lost incehs off my waist is that normal? the resson is actresses have to be like butt skinny like penelope cruz and others but how do i loose inches of my waist like i eat healthy and most of the time in small protions so i just need help on what to do more of if someone could help me that would be awesome i just need advie thank you guys so much if you answer