The Love of Siam

Sunee (as Sinjai Plengpanich)

Korn

Grandmother

Tang / June (as Chermarn Boonyasak)

Young Mew

Ying

Donut

Mew

Pee Aod

Physical Education Teacher (as Charunee Boonsek)

Earth (as Natthaphong Aroonnet)

Jeng

Kao Sai

Whae

X

Pingpong

Tor

M

Van

Arm

Mike

Aong

Max

Petch

Julia

Jee Da

Grandfather

Mew's Mother

Mew's Father (as Metha Sereethanawongs)

Mind

Aunt On

Ying's Mother

Ying's Brother (as Matthew Chookiat Sakveerakul)

Young Ying (scenes deleted)

Piano Teacher (scenes deleted)

Doctor

DJ Siam Owner

Toy Shop Owner

Cigarette Seller

Donut's Boyfriend No. 1

Donut's Boyfriend No. 2

Donut's Boyfriend No. 3 (scenes deleted)

Concert MC

Music Share Holder 1

Music Share Holder 2

Music Share Holder 3

Eak

Eak's Wife

Eak's Son

Eak's Daughter

Ying's Labour 1

Ying's Labour 2

St. Joseph

Maria

Hotel Owner

Shepherd

Lamb 1

Lamb 2

Donkey 1

Donkey 2

Stage Acting Trainer

Bully 1

Bully 2

Bully 3

Bully 4

Supporting Band

The Love of Siam (2007) dominated Thailand's 2007 film awards. It won the Best Picture category in all major national film award events, along with several other awards, including from the Thailand National Film Association, Starpics Magazine's Starpics, the Bangkok Critics Assembly, Star Entertainment, and the Kom Chad Luek Awards. The awards won by the film included the following: Starpics Awards: Best Picture, Best Director (Chookiat Sakveerakul), Best Actor (Mario Maurer), Best Actress (Sinjai Plengpanit), Best Supporting Actor (Songsit Roongnophakunsri), Best Screenplay (Chookiat Sakveerakul), Best Cinematography (Chitti Urnorakankij), Best Original Score (Kitti Kuremanee), and Popular Film. Kom Chad Luek Awards: Best Picture and Best Actress (Sinjai Plengpanit). Thailand National Film Association Awards: Best Picture, Best Director (Chookiat Sakveerakul), and Best Supporting Actress (Laila Boonyasak). Bangkok Critics Assembly Awards: Best Picture, Best Director (Chookiat Sakveerakul), Best Actress (Sinjai Plengpanit), Best Supporting Actress (Laila Boonyasak), Best Screenplay (Chookiat Sakveerakul), and Best Original Score (Kitti Kuremanee). Star Entertainment Awards: Best Picture, Best Director (Chookiat Sakveerakul), Best Actress (Sinjai Plengpanit), Best Supporting Actress (Laila Boonyasak), Best Screenplay (Chookiat Sakveerakul), and Best Original Song. Osaka Asian Film Festival 2009: Audience Award. The film was also nominated for Best Supporting Actor (Mario Maurer) and Best Composer (Kitti Kuremanee) categories in the Asian Film Awards at the Hong Kong International Film Festival, but did not win either award. In October 2008, Mario Maurer won the Best Actor award in the Southeast Asian Film category at the 10th Cinemanila International Film Festival in Manilla, Philippines.

The background song during the second encounter of main protagonists in Siam Square is also composed by the director and perform by the August Band. However, the track wasn't included on the OST, but later was included in the August Band's second album (the track name is "Ard-Ja-Pen").

Tong's real name, visible on his boyscout uniform, is given as Theerat Tongsrisuebasakul, a tribute to the late production designer Monchai Tongsrisuebasakul.