Yavarum Nalam (transl. All are fine) is a 2009 Indian Tamil-language horror film written and directed by Vikram Kumar. The film stars R. Madhavan and Neetu Chandra. Produced by Suresh Balaje and George Pius, the film was simultaneously shot in Hindi as 13B: Fear Has a New Address with a slightly different cast. It was also later dubbed into Telugu as 13-Padamoodu, featuring a few scenes reshot with Ravi Babu. The film's soundtrack was composed by Shankar–Ehsaan–Loy, while Tubby-Parik provided the background score. Released on 6 March 2009, the film received mixed reviews but was commercially successful. Rediff placed the film in its list of top Tamil films of 2009, while the American entertainment publication Collider considered it an original and one of the greatest Indian horror films of all time, praising its mixing elements of J-horror with a unique storyline.

A web series with a similar theme called Dhootha written and directed by Vikram Kumar was released in 2023. Some have speculated that Yavarum Nalam and Dhootha exist in the same universe, while others have said that Dhootha is a standalone sequel to Yavarum Nalam.