Phoebe Waller-Bridge and Sian Clifford

'Fleabag' creator Phoebe Waller-Bridge became best friends when attending prestigious drama school Royal Academy of Dramatic Art together. Phoebe later cast Sian in her hit BBC series and Sian explained that she "owes everything" to PWB. She said: "I was very studious. I’d been rejected twice previously so I really wanted it. I was focused on learning everything. Our friendship and support of one another’s pursuits remained steady. We have supported each other through our ups and downs. I really do owe her everything. And I’m really enjoying reaping the rewards and riding on her coattails."