Sharp, who was born in Dumfries and lived in Lochmaben, will be making her World Championship debut in Bejiing.
The 25-year-old missed out on the 2013 World Championships through an injury which resulted in an operation on a leg tendon.
But last August, at the 2014 Commonwealth Games in Glasgow, she ran 2:01.34 to win a silver medal in the 800 m.
The night before the final, Sharp suffered stomach cramps and sickness and had to be placed on a drip at the Polyclinic at the Athletes’ Village until 5.30 am on the morning of the race.
Two weeks after the Commonwealth Games, she won a silver medal at the European Championships in Zürich, breaking Susan Scott’s Scottish record of 1:59.02, with a time of 1:58.80, to move to eighth on the UK all-time list.
Sharp is the daughter of former Scottish athletes Cameron and Carol Sharp.
Her father won a 1982 European silver medal in the 200 m and competed at the 1980 Olympic Games, while her mother has an 800 m best of 2:02.91 and competed at the 1982 Commonwealth Games.