Alexander Armstrong
![Armstrong in 2005](https://upload.wikimedia.org/wikipedia/commons/a/a7/Alexander_Armstrong_%28cropped%29_%284by3%29.jpg)
Armstrong is a member of the comedy duo Armstrong and Miller. His television credits include ''Armstrong and Miller'', ''Beast'', ''Life Begins'', ''Hunderby'' and ''Danger Mouse''. He is also known as the voice of Mr Smith, Sarah Jane Smith's alien supercomputer in ''The Sarah Jane Adventures'' and the series 4 two-part finale of ''Doctor Who''.
Armstrong is a bass-baritone singer and has released three studio albums. Provided by Wikipedia