Abbi is a young and talented player who'll give speed and versatility to our attack.Marta Tejedor
The 23-year-old forward is an exciting talent and continues the reshaping of the side under Marta Tejedor.
Grant previously plied her trade at Rangers, Glasgow City, Hibernian, Celtic and most recently Anderlecht - the side she helped fire to the Super League title last season.
"Abbi is a young and talented player who'll give speed and versatility to our attack in different positions of the field," said Blues Coach Tejedor.
"Her outstanding athletic qualities, together with the fact that she can play off both feet and sides, makes her a very interesting and valuable acquisition for next season."
Grant won four league titles over two spells at Glasgow City, scoring 47 goals in the Scottish Premier League for them.
However, she was equally prolific in the domestic cups, scoring five in the league cup and 11 in the Scottish Cup.
Grant is also no stranger to Champions League football, boasting an impressive record in the competition scoring on six occasions, including a last 32 hat-trick in 2017.
During her six month spell at Anderlecht, Grant lifted the Super League title having played a key role in their success. She scored eight goals in 12 games, as well as making one assist.
Internationally, Grant made her Scotland debut in March 2018, coming off the bench in a 2-0 win over New Zealand.
She failed to make the cut for Scotland's World Cup squad but the move to Blues and WSL football is sure to help her achieve her ambitions with her country.