At the age of 16, Maurer became a model doing photo shoots, commercials and music videos. In 2007, he made his feature film debut in a leading role in The Love of Siam, written and directed by Chukiat Sakweerakul.The role "Tong" brought him many accolades and instant fame far beyond Thailand's borders. Commenting on his new-found fame, "I didn't want to do it, Acting wasn't on my list to do." He decided to do the movie because he trusted the director "Chukiat" and the movie would give him many opportunities. He'd be making money to help his family. He became famous in this film because of his gay role. He gained popularity and became famous in the Philippines because of his role (P' Shone) in the movie Crazy Little Thing Called Love with Fern Pimchanok.
The Love of Siam (Thai: รักแห่งสยาม, RTGS: Rak Haeng Sayam, pronounced [rák hɛ̀ŋ sà.jǎːm]) is a 2007 Thai gay-themed romantic-drama film written and directed by Chookiat Sakveerakul. A multi-layered family drama, a groundbreaking element of the story is a gay romance between two teenage boys.
Friendship (Thai: เฟรนด์ชิพ เธอกับฉัน) (also known as Friendship You and Me) is a 2008 Thai Romantic Teen Film starring Mario Maurer and Apinya Sakuljaroensuk (Ploy) directed by Chatchai Naksuriya. The film is around 1983 setting and is about Singha and Mituna's endless love for each other. The film starts with the present and goes back to the past of their high school days.
4 Romance (Thai: ฝัน-หวาน-อาย-จูบ หรือ or Fan Waan Aai Joop) is a 2008 Thai romantic comedy, released in Thailand's cinema on December 25, 2008. This film was directed by four directors: Chukiat Sakveerakul, Prachya Pinkaew, Bandit Thongdee, and Rachain Limtrakul.
First Love (A Little Thing Called Love) (Thai: สิ่งเล็กเล็ก ที่เรียกว่า..รัก) (Sing leklek Tee reak wa... Rak), better known as Crazy Little Thing Called Love, is a 2010 Thai romantic-comedy drama film and also a 2011 Asian sleeper hit film starring Mario Maurer and Pimchanok Luevisadpaibul.
Saranae Siplor revolves around an unusual family who travel by truck around the country in order to discover the way to become a real man for one of their members. Surprises, laughs and chaos keep happening during their adventure.
Rahtree Reborn Surrounded by tranquility of the apartment, a horrible spirit in the room 609 is lurking, and going to be awaken. This time the terrors are triplex.
"Autumn Destiny" is a melodrama that centers on the love and betrayal of young men and women. Ploy plays a young girl name Ji Joon, Eli plays Junsu, the guy her aunt wants her to marry. But Ji Joon loves Kim Minho (Mario Maurer), our lead guy.
Saranae Hen Pee is about Two friends pick a fight with an influential local bigwig in a pub and have to run for their lives. They are helped by a sexy dancer and together the three of them escape to the compound of a deserted temple. However it turns out they have have only escaped the frying pan to land in the fire as they are now surrounded by ghosts.