18 pairs of famous siblings with huge age differences between them

• Celebrity age gaps aren't only a thing in relationships — there are plenty of famous siblings out there with a substantial difference in age.
• Kourtney Kardashian is 18 years older than her youngest sister Kylie.
• Siblings James and Dave Franco are eight years apart.

Not all celebrity siblings are close in age, like Julianne and Derek Hough (three years) or John and Joan Cusack (four years). Sometimes, they have to wait a little longer — or in some cases, a lot longer.

Whether they're half-siblings or because their parents just chose to wait before having another kid, these 18 pairs of famous brothers and sisters all have an age gap of eight years or more.