ST. THOMAS, Ont. -- Two people accused in the slaying of a southern Ontario kindergarten teacher have pleaded guilty in the woman's death.

Michael MacGregor, 20, and Tanya Bogdanovich, 32, were both charged with first-degree murder in the death of Noelle Paquette.

They entered their guilty pleas in a courthouse south of London, Ont., on Friday where pre-trial motions in their case have been taking place.

Paquette's body was found in January 2013 in a woodlot southeast of Sarnia, Ont., one day after she went missing.

The 27-year-old was last seen leaving a New Year's Eve party.

MacGregor and Bogdanovich's trial was to begin in April 2016, but their guilty pleas, which came as a surprise, now mean their case will next be in court in February, where a comprehensive statement of facts is expected.

Paquette's murder stunned the city of Sarnia.

Her death sparked a charity -- Noelle's Gift -- which helps disadvantaged children.