Addalie Grace Christensen was abducted from Stephenville, TX on Friday.
The two-month-old baby was last seen at 9:47 a.m. at 1070 West Lingleville, police said.
The abductor, who has not been named but is between 30 and 40 years of age, is believed to have fled on foot.
Christensen is a white female with brown hair and blue eyes.
She weighs about 12 pounds and was last seen in a dark blue onesie with red and white stars.
She also had a red bow in her hair.
Police believe that toddler may be in grave or immediate danger.
Anyone with information should contact police at 254-918-1273.