Chunn, who has worked at the magazine since its launch last year, said she planned to inject more personality into the magazine and reinforce its UK identity. The magazine is modelled on a successful US brand.
Chunn said: 'In Style is a global brand and we get a fantastic deal from the US magazine, but we want to make it reflect the fact that it is a British magazine. I am excited by using more local content and celebrities.'
'We will still use foreign stars but the best story in the latest issue is about two UK actresses going to Madeira with In Style. I think we can do more like that,' she added.
Chunn was previously editor of J17, and the Evening Standard's ES magazine and joined In Style from the deputy editorship at Vogue.
She takes over from launch editor Dee Nolan who last month moved to an editorial development role with IPC's parent company Time Inc, in New York.
The magazine recorded an ABC for the second half of last year of 151,159.