Baazi, Guru Dutt’s directorial debut. The film, written by actor Balraj Sahni, was a trendsetter of sorts leading to the spate of urban crime thrillers Bollywood churned out in the 1950s. The film took Dev Anand to dramatic star status. It was also the beginning of seeing Dev play mostly hard-bitten characters living in the urban underbelly.

The next pairing of Dev Anand and Guru Dutt was Jaal (1952). Dev played a heartless smuggler who only repents right at the end of the film. It was a finely shaded performance but the film didn’t do too well at the box-office. The partnership came to an end when Guru Dutt decided to act in his own films.
Dev anand went for guru dutt and they cameo ut with baazi in 1951 the film did very well. It took dev anand to a star status.

Dev Anand Express his views about Guru Dutt in an Interview

Our friendship dates back to the Prabhat era..he was assistant director to a very famous director. I had just started as a leading man. I think if I can call anybody in the movie industry as my greatest pal it was Guru Dutt. And we struck a great friendship jaise langotiya yaar kehte hain hum jaise dost the. And we struck a deal over a glass of beer and then he said Dev..if I ever become a director you are my star and I said if I ever form a company and I invite a directory to direct a film you’re going to be THE one.

I was on the sets of Teen Deviyan and I was ghost directing for Amarjeet a friend of ours and I got a news that Guru Dutt is dead. I packed up.. I went straight to his house and I was the first man to see him lying on his bed. There wasn’t anybody in the room. I was the first man to enter the apartment and be near his body. and I saw him and his face was blue slightly. There was a glass of…. there was a blue liquid in a glass next to him and I think. I do not know what happened….it was a very sudden death. and I had met him 5-6 days earlier when he had invited me -come over let’s do a picture together but at that moment a I also realized when I saw that he was looking very frail very feeble…yellow on the face, he had lost his hair. This was not the same Guru Dutt because he had made some very beautiful films…the film that he made Kaagaz Ke Phool was a very brilliant film but it didn’t do well..and he could not take it after that he never directed a picture. so that was the start of his physical downfall. Even his creative downfall. Sad..

Sources : http://dearcinema.com/devanand-interview-1/