The film was originally titled "De De Pyar De".

In the masquerade party sequence, Tom disguises himself as a priest from Amar, Akbar and Anthony (1977), Dick disguises himself as Radhe Mohan from In Your Name (2003) and Harry disguises himself as the titular character in Mangal Pandey: The Rising (2005).

The film was going to be made by Jackie Shroff productions as " Raju Raja Ram". Starring Jackie Shroff, Salman Khan , Govinda, Manisha Koirala. The film got shelved and was eventually made by Deepak Tijori with a new star cast, 9 years later.

Rajpal Yadav was replaced by Anuj.

Sohail Khan had originally had the rights to the title "Tom Dick Harry". He was going to make a film with himself, Salman Khan and Arbasz Khan. When he did not renew the title, actor Sudesh Berry took the title Sudesh was going to produce a film by the name. When Deepak Tijori requested the title, Sudesh gave him the title as a kind gesture.

Actor-director Deepak Tijori had found himself in a legal tangle prior to the release of his film Tom, Dick and Harry. And the person who has landed him there is Sohail Khan, who had sent him a legal notice for use of the title. Sohail Khan wanted to claim damages to the tune of Rs.10 crores, as he claimed that he had registered the title in August 2003. He even informed Deepak that the title was not available but the producers of the film were adamant. The producer of Tom, Dick and Harry, Surendra Bhatia insisted that they had registered the name with the Association of Motion Pictures and TV Programme Producers (AMPTPP) in August. The rights of the title were with Sudesh Berry, earlier. Sohail Khan has not renewed the title since the past two years, whereas according to the rules, a producer has to renew the title every year, till the shooting commences. The shooting for Tom, Dick and Harry was almost complete and changing the title at that juncture would not be possible.

Mahesh Manjrekar's shelved film " Sab Golmaal Hain". starring Sharman Joshi, Sahil Khan and Prabhudevaa. The film was to be based on the Marathi play " All The Best" This was in 2003.The film was previously being made as " Raju Raja Ram" with Jackie Shroff, Govinda and Salman Khan. The film was eventually made as " Tom Dick and Harry " in 2006.

In 1980, a film titled Teen Bandar was being made based on the same stage play. It starred Sanjeev Kumar (replaced by Uttam Kumar), Amjad Khan, Bharat Kapoor.Directed by actor Amrut (Amrit) Patel. The film was shelved when Uttam Kumar passed away.

The intro of the sing Zara Jhoom Jhoom was sampled from Eazy E song Gimme That Nutt.