Video - Jim Parsons From 'The Big Bang Theory' Snapped Outside David Letterman Show

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'The Big Bang Theory' star Jim Parsons poses for press photos outside the New York studios for 'The Late Show With David Letterman' before being ushered into the building.

The actor recently appeared on 'CBS This Morning' where he described the nerd sitcom he stars in as 'the best thing that's ever happened to me'. 'I don't feel like I would have done Broadway yet, if it weren't for the show', he admits, referring to his starring role as the eccentric Elwood P. Dowd in the stage revival of the 1950's movie 'Harvey'.