Mc Adams started figure skating at the age of four and received an opportunity for pair skating training in Toronto when she was nine years old.She has won many regional awards competing in skating until the age of 18.The same year, Mc Adams starred opposite Ryan Gosling in the romantic drama .
She was cast alongside James Gamer, Gena Rowlands, and Sam Shepard, among others.
She gained an MTV Movie Award and four Teen Choice Awards for her performance.
She was active in sports and has played volleyball, badminton, and soccer.
Mc Adams was a member of the Peer Helping Team and served on the student council.
In 2004, Mc Adams made a breakthrough performance starring in the comedy movie, .
She was cast opposite Lindsay Lohan, Lacey Chabert, and Amanda Seyfried, among others.
She is Canadian and is of mixed (English, Irish, Scottish, Welsh) ethnicity.
She is the daughter of Sandra Mc Adams and Lance Mc Adams.
Mc Adams studied at Myrtle Street Public School and later went to Central Elgin Collegiate Institute.
She was not interested in study in her early days, as she used to avoid school pretending to be sick.
Her father was a truck driver and her mother was a nurse.