Udaykrishna–Sibi K. Thomas is an Indian screenwriting duo known for their works in Malayalam cinema. Most of their works are in the comedy genre. They wrote films such as Mattupetti Machan (1998), Udayapuram Sulthan (1999), Dhosth (2001), C.I.D. Moosa (2003), Runway (2004), Kochi Rajavu (2005), Thuruppu Gulan (2006), Twenty:20 (2008), Pokkiri Raja (2010), Christian Brothers (2011) and Mayamohini (2012); all commercial hits.