Udaykrishna–Sibi K. Thomas

Both Udayakrishna and Sibi started their careers as assistant directors. Sibi assisted Balu Kiriyath and Sandhya Mohan, while Udayakrishna assisted screenwriter A.R.Mukesha and was assistant director under Balu Kiriyath, Ali Akbar, K. Madhu and Venu B. Nair.^[4] Manoj K. Jayan prodded them into a partnership and agreed to star in their directorial debut.^[4] However, that project did not work out. Subsequently, they wrote their first script, Hitler Brothers (1997), for Sandhya Mohan, followed by Mayajalam for Balu Kiriyath. Both films failed at the box office.^[4] The duo's first hit came through Mattuppetti Machan directed by Jose Thomas, followed by Udayapuram Sulthan.^[4] Then came Sundra Purushan, which was a moderate success.

It was followed by Rajasenan's successful movies, Darling Darling and Malayalimamanu Vanakkam. C.I.D. Moosa, was a success. They associated with Johny Antony in most of his directorial ventures thereafter, including the commercially successful Kochi Rajavu and Thuruppu Gulan.^{[citation needed]} They worked with veteran director Joshiy in Runway, Lion and July 4, and in the landmark Malayalam film Twenty:20. Twenty:20 was produced by Association of Malayalam Movie Artists in association with Dileep's Grand Productions and starred most major actors of Malayalam cinema. The film became the highest grossing Malayalam film of all time and brought appreciations for Udayakrishna and Sibi.^[5]

Twenty:20 was followed by Ee Pattanathil Bhootham, which was panned by the critics and an average grosser. In 2010, they made a comeback with Pokkiri Raja, which went on to become a big success and the highest-grossing film of the year.^[6] However, critical responses for Pokkiri Raja were mostly mixed. They scripted debutante Thomson K. Thomas's Kaaryasthan. Despite negative reviews from critics, the film closely followed Pokkiri Raja in collection records of the year.^[6] Their only film in 2011 was Christian Brothers with Joshiy, which became a success.^[7][8][9] They scripted two films in 2012, Mayamohini and Mr. Marumakan. The former was a success and was among the highest-grossing films of the year while the latter, despite heavy criticism, became an average hit. The last release in their combination is Ivan Maryadaraman.

Udaykrishnan is married to Manju and has a son named Chandik. Sibi is married to Jisha and has a son and daughter.^[14]