She made her maiden Olympics appearance representing Sri Lanka at the 2012 Summer Olympics. In July 2012, she received a wild card entry to compete at the 2012 Summer Olympics after failing to meet direct qualification criteria. She was also the only female track and field athlete from Sri Lanka to compete at the 2012 Olympics and was just one of two track and field athletes from Sri Lanka to represent the county at the London Olympics alongside Anuradha Cooray. She took part in the women's 400m hurdles at the 2012 London Olympics and was placed at 30th position and was eliminated in the first round, though she broke her own seasonal record with 57.15 seconds. She was persuaded by the then President of Athletic Association of Sri Lanka Major General Palitha Fernando to represent Sri Lanka at the 2012 Olympics and she qualified to represent Sri Lanka at the Olympics through her mother. She also received media attention from viewers and became an internet sensation when she was lined up as part of Sri Lankan contingent during the opening ceremony of the 2012 London Olympics. She was also included in a list of most attractive Olympic athletes of all time. She was also dubbed as an "Accidental Olympian" by the San Diego Union-Tribune. Christine also became the first UC San Diego's first track and field athlete to compete at the Olympics and became the third Olympian from Bakersfield to participate at the Olympics after Jimmy Watkins and Jake Varner.