Whakaotihia te rerenga e whai ake nei: I whanau a Watson ki Bristol ki te whaea Welsh me te papa Ingarihi. He tuahine takirua tāna, ko Emma rāua ko Lucy, ā, he tuakana, ko Paora. I haere ia ki Henleaze Junior School, kātahi ki Bristol Grammar School, he kura motuhake i wini ai ia i te tohu 'Gabbler of the Year', i mua i tana haerenga ki Queens' College, Cambridge, i reira ia i ako ai i te reo Ingarihi, i puta ai ia me nga tohu honore tuatahi. I te whare wananga he mema ia o nga Footlights me te wa o Stefan Golaszewski, Tim Key me Dan Stevens. I uru ia ki te whakaaturanga i tohua mo te waahanga Best Newcomer i te
Perrier Comedy Awards i te 2001 Edinburgh Festival Fringe me te whakahaere tahi i tetahi arotake me Key.