Sagai (English: Engagement) is a 1951 Bollywood film starring Premnath and Rehana directed by H. S. Rawail. It was the second time H. S. Rawail collaborated with Varma Films after the success of their previous film Patanga, which was the seventh highest-grossing film of 1949. As in Patanga, Rajendra Kumar, who would rise to become one of the leading actors in Indian cinema, worked on Sagai as an assistant to director H. S. Rawail.

Sagai was distinguished by the use of its filmmakers not only to use the same director of their recent hit film Patanga, but also to use several other members of Patanga’s ensemble hopefully to create a blueprint for success. Like in Patanga, H.S. Rawail’s wife, Anjana Rawail, was the storywiter of Sagai.

Also, several cast members of Patanga, such as Purnima, Gope and Yakub played important roles in Sagai . Finally, and perhaps most importantly, the music of Sagai was composed by C. Ramchandra, who also had composed the hit music of Patanga.