The London-based socialite, musician and model - who is known for her signature half-shaved head and punk style - was handpicked by Chanel's Karl Lagerfeld after the pair met at a photo shoot some months ago.
A Chanel spokesperson said: "[Karl Lagerfeld] had a crush on this unique, charismatic young lady, who is both a model and musician, during a photo shoot several months ago. This previously unforeseen alliance finally became self-evident. Alice Dellal represents the perfect incarnation of all that is unique about the Boy Chanel handbag collection, which strives [to be] far from conformist notions of femininity."
Karl took the pictures for the campaign, which will be released worldwide in March.
Alice - who is the sister of shoe designer Charlotte Dellal - has previously described her style as "tomboy" and says her dad used to be her fashion icon, even revealing her half-shaved head was inspired by him.
She said: "When I was little I was such a tomboy - I loved a baggy T-shirt and leggings. Charlotte's always been very stylish - she used to dress me when I was really young. We'd look identical, but we're so different. She'd be reading Agatha Christie and I, well I, wasn't. I was always more attracted to what my Dad was wearing. Charlotte and Mum are much more similar. Charlotte would get Mum's hand-me-downs, then I'd get them after she was done with them. If I'm feeling a bit glamorous though, I love wearing a pair of her shoes.
"Charlotte actually suggested I have it my hair done like this. My brother and my Dad always used to shave their hair and I remember thinking 'Why can't I do the same?' It's kind of ironic that it was my sister's idea, but I would give her total credit for it. The style's becoming more normal though - I see quite a few girls with similar hair now."