Is the youngest son of Richard and Peggy Treanor. He has two elder brothers, Brian and Adam, and an elder sister, Erin.
The casting director of 3 Ninjas (1992) was scouting martial arts' clubs for boys to appear in the film when Michael was discovered. His friends persuaded him to take the casting director's advice and audition for the role of Samuel 'Rocky' Douglas in the children's martial arts film, which he went on to successfully win. However, acting was not a lifestyle Michael enjoyed and he pined for normality so he turned down the chance to do 3 Ninjas Kick Back (1994) and the role went to Sean Fox instead.
As a child, Michael was a talented martial artist in real life, training in karate and the Korean martial art of Tae Kwon Do. He achieved his black belt by the time he was twelve. He still continues to train as an adult.
His elder sister Erin was an extra in 3 Ninjas Knuckle Up (1995). She featured in the pizza parlour scene.
Studied computer science at university and now resides in Woodland Hills, California. He also did a stint as a barman in a Malibu club.