Rajesh Roshan is the son of Hindi film composer Roshan and younger brother of film director and actor Rakesh Roshan. He is also uncle to actor Hrithik Roshan, in whose films he composes many songs for example Kaho Naa Pyaar Hai (2000), Koi Mil Gaya (2003), Krrish (2006), its subsequent sequel Krrish 3 and Kites (2010). He has a son named Eshaan and a daughter named Pashmina. His son is set to make his film debut soon while his daughter studies at Ecole Mondiale World School,Mumbai.
Rajesh Roshan had a successful association with Basu Chatterjee, Dev Anand, Mohammed Rafi, Lata Mangeshkar and Kishore Kumar. He shot to fame with the score for Julie for which he won the Filmfare Best Music Director Award. The first break for him was given by Mehmood. He is the first music director who made Amitabh Bachchan sing. He usually composes music for the films that his brother Rakesh Roshan either produced or directed, such as Kaho Naa Pyaar Hai (2000), Koi... Mil Gaya (2003), Krrish (2006) and Kites (2010). He also composed the song "Jaane Tamanna" for the internationally acclaimed film Valley of Flowers (2006) by Pan Nalin.
Rajesh Roshan scored well in the big break given by Mehmood for Kunwara Baap (1974) and then by Dev Anand in three back to back hit films: Des Pardes, Man Pasand, and Lootmaar. Then he composed melodious tunes and made Kishore Kumar sing them in films like Doosra Aadmi, Muqaddar, Swami, Khatta Meetha,Baaton Baaton Mein, Yehi Hai Zindagi, Ek Hi Raasta, Swarg Narak, Inkaar, Do Aur Do Paanch followed by films with Rajesh Khanna like Nishaan, Babu and Aakhir Kyon?. However, since 1985 he has composed songs mostly for his brother's films. His hit song filmed on Helen, i.e. "Mungda...Mungada..." is still a landmark in cabaret songs in Bollywood.
In the 1990s, when even Laxmikant-Pyarelal and Bappi Lahiri gradually lost their bearings, Rajesh has endured through films like Kabzaa, Jurm and Bahaar Aane Tak (1990) – and after another dull phase, Karan Arjun and Sabse Bada Khiladi (1995), Papa Kahte Hain (1996), Koyla (1997)], Daag: The Fire (1999), Kaun Sachaa Kaun Jhootha, Dastak (1996), Dandnayak and Main Solah Baras Ki (1998).
Rajesh Roshan delivered several hit music scores pairing with his brother Rakesh, who had emerged as a director of great stature. The two worked on films like Kaam Chor, Jaag Utha Insaan, Khoon Bhari Maang, Khel, Kishan Kanhaiya, Kaala Baazar, King Uncle, Karan Arjun, and Koyla. Rajesh scored the music for "Kaho Naa...Pyaar Hai", the launch vehicle of Hrithik Roshan, and one of his brother's most ambitious projects. The film achieved significant success. The composer also won the Filmfare Award for Best Music. He has composed the music of several Hrthik-starring, Rakesh Roshan-directed films, such as Koi... Mil Gaya, Krrish, Kites and Krrish 3.
Rajesh Roshan is considered to have the longest career span starting in 1974 till date, as a result the composer got an opportunity to worked with almost all the famous singers from five decades with some fine work like Julie, Swami, Jurm, Khoon Bhari Maang, Karan Arjun, Papa Kehte Hai, Kaho Na Pyar Hai, Koi Mil Gaya and Kites.
During 70's and 80's he mostly worked with Mohammed Rafi, Kishor Kumar, Mukesh, Lata Mangeshkar, Mahendra Kapoor, Asha Bhosle, Yesudas, Amit Kumar, Nitin Mukesh, Usha Mangeshkar, Manhar Udhas, Shailender Singh, Shabbir Kumar, Mohammad Aziz, Anuradha Paudwal, Sadhana Sargam, Alka Yagnik, Vijay Benedict, Anwar and Preeti Sagar.
During the 1990s and 2000s the composer continued his work with some of the singers who sang for his compositions in 80's along with Kumar Sanu, Udit Narayan, Abhijeet, Hariharan, Lucky Ali, Sonu Nigam, Sudesh Bhosle, Vinod Rathod, Sukhwinder Singh, Kavita Krishnamurthy, Adnan Sami, Shaan, KK, Sunidhi Chauhan, Sapna Mukherjee, Babul Supriyo, Kamaal Khan, Mahalakshmi Iyer, Chitra, Sneha Pant, Kunal Ganjawala, Taz, Pamela Jain and others.
And rescently for Krazzy 4, Kites and Krrish 3, he has also worked with the new generation singers like Mohit Chauhan, Vishal Dadlani, Kailash Kher, Zubeen Garg, Neeraj Shridhar, Suraj Jagan, Anushka Manchanda, Monali Thakur & Sowmya Rao.
Singer Udit Narayan recorded his first Bollywood song "Mil Gaya Mil Gaya" from the movie Unees-Bees along with legendary singer Mohammad Rafi and composed by Rajesh Roshan.
He is very well known for copying many famous English songs into Hindi, like Tumne Jo Kaha which is actually copied from Barbie Girl