Jane Birkin

When my father died, my mother came back from being Mrs. Birkin to being Judy Campbell. She was a stunning actress. She came out of her shell. She was herself again: this very independent, funny, intellectual lady - and was able to perform again, which was her life before meeting my father squashed it out.

I colour my hair mousy brown and I wear makeup only on stage. I use Laura Mercier - something called Biscuit, I think. I run one tiny sponge over my face and cover the red blotches. If I've got some rouge, I'll bung it on my mouth and cheeks.

Startups need to focus on building a foundation for their company culture early, and then they need to revisit it often. Every time a hire is made, a feature is launched, a Facebook status is updated, a press interview is given, a round of financing is raised, or a meeting is held, culture should be part of the decision-making process.