Aranmanai 4 (transl. Palace 4) is a 2024 Indian Tamil-language comedy horror film directed by Sundar C. It is produced by Avni Cinemax and Benzz Media (P) Ltd. The film stars Sundar, leading an ensemble cast that includes Tamannaah Bhatia, Raashii Khanna, Santhosh Prathap, Ramachandra Raju, Kovai Sarala, Yogi Babu, VTV Ganesh and Delhi Ganesh. The film was partially reshot in Telugu as Baak with Vennela Kishore and Srinivasa Reddy replacing Yogi Babu and VTV Ganesh, respectively. It is the fourth instalment in the Aranmanai film series. Hiphop Tamizha composed the music, while E. Krishnasamy and Fenny Oliver handled the cinematography and editing, respectively.

The film marks Khanna's second collaboration with Sundar after Aranmanai 3 (2021) and with Bhatia after Action (2019). Aranmanai 4 was theatrically released on 3 May 2024, and received mixed to positive reviews from both critics and audiences. The film grossed over ₹100 crore at the box office against a budget of ₹40 crore, making it the highest-grossing film in the franchise and one of the highest grossing Tamil films of 2024.