Police say Keisha Horseman, who is 26, and David Michael Smith, who is 22, have been remanded in custody in Grande Prairie.
A 14-year-old youth, who has also been charged but cannot be identified, has been released with conditions.
The three face numerous charges that include kidnapping, abandoning a child and theft of a motor vehicle.
They are all to appear in Grande Prairie provincial court on Monday.
Police issued an Amber Alert for the seven-month-old baby after a pickup was stolen Tuesday from outside a home in Grande Prairie.
The girl named Addison was discovered a few hours later, still in her car seat, on the porch of a rural home south of the city.
Police say a person in the house found the infant, who appeared to be unharmed.
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