Alice Rothschild
James's sister Alice had the usual stint on the London social scene in her younger years, then she paired up with fellow finance scion Zac Goldsmith, a Baron, environmentalist, conservative MP, and one-time London mayoral candidate. Alice, however, prefers fashion to politics - in 2013, she co-founded a high-end children's clothing line called Dotty Dungarees (which recently collabed with Alice + Olivia, a favorite of Alice's sister-in-law, Nicky).