6 user 9 critic

Love on a Diet (2001)

Sau sun nam lui (original title)
A depressed, obese woman tries to lose weight in order to win back her ex-boyfriend with the help of a fellow Hong Konger whom she met in Japan.


Johnnie To, Ka-Fai Wai (as Wai Ka Fai)


Ka-Fai Wai (as Wai Ka Fai), Nai-Hoi Yau (as Yau Nai Hoi)
1 win & 7 nominations. See more awards »




Credited cast:
Andy Lau ... Fatso
Sammi Cheng ... Mini Mo
Rikiya Kurokawa Rikiya Kurokawa ... Kurokawa
Asuka Higuchi Asuka Higuchi ... Kudo
Tian-Lin Wang ... Fatso's Friend (as Wong Tin Lam)
Suet Lam ... Bun Man (as Lam Suet)
Chi-Ping Chang ... (as Cheung Chi Ping)
Wai Leung Hung Wai Leung Hung ... Fatso's Friend (as Hung Wai Leung)
Mei Fan Wong Mei Fan Wong ... (as Wong Mei Fan)
Ming Nam Po Ming Nam Po ... (as Po Ming Nam)
Rest of cast listed alphabetically:
Kam-Cheong Cheng Kam-Cheong Cheng
Keiji Sato


Sammi Cheng plays Mimi Mo, a young exchange student to Japan who met and fell in love with a budding pianist, Kurokawa, played by Rikiya Kurokawa. Kurokawa eventually leaves to study music in the USA and returns to Japan as a famous musician. Meanwhile, Mimi has dealt with her depression by eating and weights over 300lbs and Kurokawa doesn't recognize her. Mimi eventually meets Fatty (Andy Lau) who helps her lose the weight so she can fulfill her promise of meeting Kurokawa made 10 years earlier. But then they fall in love..... Written by Aya

Plot Summary | Add Synopsis

Plot Keywords:

fat suit | See All (1) »


Comedy | Romance


See all certifications »

Did You Know?


During the scene outside on the street in which Fatty runs from Fatso and clings to a light pole, the back flap of her fat suit neck prosthetics has come out and is clearly visible above her shirt collar. As Andy Lau's Fatso chases her, he reaches out to try to hide it from the camera. See more »


Fatso: This is the problem. How can she lose 200 pounds in six months?
Cocaine Ken: I know!
Fatso: Don't say drugs, Cocaine Ken.
See more »


Referenced in All's Well, Ends Well 2009 (2009) See more »


Forever Beautiful
Performed by Sammi Cheng
Lyrics by Lin Xi
OP: Hilarious Productions Ltd.
Administated by EMI Music Publishing H.K. and Warner/Chappel Music H.K. Ltd.
See more »

User Reviews

Not slim in laughs
23 February 2003 | by leekandhamSee all my reviews

There are occasionally films that take an unoriginal idea, but make the most of it, ending up with a very good movie as a result. Love On A Diet is one of those.

Sammi Cheng stars as Mimi, a Hong Kong ex-pat who's living in Japan. She and her boyfriend part company 10 years earlier, during which Mimi puts on some 200 lbs in weight. When her boyfriend arrives back he doesn't recognise her to Mimi's dismay. Meanwhile a travelling salesman by the nickname of 'Fatso' is introduced to her, and helps her slim in order to fulfill a promise she and her then boyfriend made to meet at a location agreed 10 years earlier.

In an age of politically correctness and where the American Obese are suing burger chains, the film eeks the idea of insensitivity before anyone even gets to hear the plot. But get beyond prejudicing the film, and you'll find it is a well-written story that isn't really insensitive at all.

The overall plot admittedly isn't very original, but it's the originality of the scenes that makes the film wonderful. Andy Lau and Sammi Cheng thrive in their characters and really do put in performances to match. Indeed, it may be one of the best performances I've seen from the two.

The special effects are Hollywood, so you'd expect the almost flawless makeup and prosthetics on display. But quite simply everything in the movie adds up to a very fine film. And there are plenty of laughs in the script to enjoy.

Love On A Diet sees the reunion of the cast and crew behind Needing You. I didn't think Needing You was great (as my IMDB review shows), but fortunately I hadn't realised that it was the same combination of participants in this, otherwise I might have been prejudiced against this film. Fortunately I say, because I really do think that this film is on the verge of brilliance.

One to see, but mind eating too much popcorn.

8 of 9 people found this review helpful.  Was this review helpful to you? | Report this
Review this title | See all 6 user reviews »

Frequently Asked Questions

This FAQ is empty. Add the first question.



Hong Kong | Japan


Cantonese | Japanese | English

Release Date:

21 June 2001 (Hong Kong) See more »

Also Known As:

Sau sun nam nui See more »

Company Credits

Show more on IMDbPro »

Technical Specs



See full technical specs »

Contribute to This Page

Recently Viewed