A Scottish actor and filmmaker, he gained international fame for his portrayal of the Twelfth Doctor in the iconic British series "Doctor Who." Known for his sharp wit and distinctive voice, he won an Academy Award for Best Live Action Short Film for "Franz Kafka's It's a Wonderful Life." His career spans decades, with notable roles in "The Thick of It" as the abrasive Malcolm Tucker and appearances in films like "Paddington" and "The Personal History of David Copperfield."