Catherine Tate and David Tennant starred in Doctor Who (2005) together. Tennant played the Tenth Doctor and Tate played his companion, Donna Noble.
David Tennant and Catherine Tate joined forces for a 2007 Comic Relief sketch where Tate played an unruly teenager, Lauren Cooper, and Tennant as an English teacher. But, with him being Scottish, she questioned his qualifications to teach English literature.