He started his film career in 1999 with a rather serious film, Godmother.
He has showcased his talents in films like Rang De Basanti, Dhol, Golmaal, Life in a... Metro, 3 Idiots and many more.
His film '3 Idiots' was a great success in the box-office, where he played the role of Raju Rastogi and was highly appreciated by both fans and critics.
Joshi also won IIFA Best Supporting Actor Award for this film.
Apart from films, he had also hosted a game show at Real T.V. called PokerFace: Dil Sachcha Chehra Jhootha in 2009.
His upcoming film is Ferrari Ki Sawaari.