But when it comes to each other, family comes first for famous siblings Rumer, 24, and Tallulah Belle, 19.
Actress and singer Rumer treated her younger sister to a shopping spree to celebrate her 19th birthday in Los Angeles on Sunday.
Birthday treat: Sisters Tallulah Belle and Rumer Willis indulged in some retail therapy to celebrate Tallulah's 19th birthday on Sunday in LA
Rumer showed off her slender frame in a see through Gucci t-shirt and black jeans torn at the knee, paired with her trusty black motorcycle boots.
A lesson in opposites: Rumer showed off her figure in skintight black trousers and a fitted Gucci tee, while little sister Tallulah covered up in an over-sized cardigan and flowing trousers
It's my party, I'll dress how I want to: Tallulah made it clear that she was a princess for the day by donning a 'Happy Birthday' tiara during her shopping trip with her older sister
Rocker chic: Rumer wore her blonde hair in messy curls as she got into her car following her shopping trip
The famous pair appeared to have indulged in a spot of retail therapy, their arms laden with bags of clothing.
It was reported in December that the siblings, including middle sister Scout, 21, had cut off contact yet again with their mother Demi mere months after reconciling from another nasty fallout.
Together we stand: The sisters are allegedly keeping their distance from their hard-partying mother Demi. They claim to be 'mortified' by her erratic behaviour following her split from Ashton Kutcher
Protective big sister: Rumer is working hard to launch her acting and singing career, but she found time in her busy schedule to celebrate her younger sister's birthday
Shopping success: The famous sisters were seen carrying bags of clothes after their shopping spree
Sleek and sophisticated: The sisters were chic and fashionable at the unveiling of a Die Hard mural in Los Angeles on ThursdayRumer and Tallulah were pictured on Thursday looking decidedly more chic at an unveiling of a massive Die Hard mural in Los Angeles.
The sisters were there to support their father Bruce as the huge painting of the star as a young man was shown for the first time.
I see you: The massive mural revealed Bruce Willis as a young action hero in the movie Die Hard