The project - which had its theatrical opening in the UK on Friday - has beaten earlier releases, including last month's Naachle London.
"With a satellite deal on the table and North America distribution signed off, 7 Welcome To London has seen the kind of success no other British Asian cinema release has had," a trade analyst revealed.
Aliakbar Campwala, who plays Goldie in the film, said that Tamil cinema star Rajinikanth had inspired him during the making of the project.
"If you are playing a South Indian in any film, it's difficult to not associate yourself with the ideologies and inspiration of the legendary Rajniji," he told Digital Spy.
"Any South Indian would be just bound by his magical films wherever you are living in the world. Playing the South Indian Goldie was a good challenge as I was born in Mumbai. My mum's side of the family is from South India so I had to just refresh those memories and act the character of Goldie."
Anupam Kher-trained model-turned-actor Imam said that she had to audition a number of times in order to win the part of Simran.
"I got rejected by Asad because I went to the casting in full-fledged make-up, while he was looking for a simple girl," she explained.
"So when I was called again minus make-up, I went in wearing a bit of foundation, but he made me wash my face, tie my hair up and put on a dupatta. After that I had to read every single scene of the film."
7 Welcome to London is out now in the UK.
> Asad Shan interview: '7 Welcome to London is Bollywood but slicker'
Watch the latest track from the film, 'Yaadan' remix: