An 18-year-old is due to appear in court charged with two counts of attempted murder following the shooting of five-year-old Thusha Kamaleswaran.
Kazeem Kolawoli was charged following the shooting of Thusha and 35-year-old Roshan Selvakumar in Stockwell, south London, on March 29.
Kolawoli, of Black Prince Road, Lambeth will appear at Camberwell Green Magistrates' Court.
Anthony McCalla, 19, of Oakdale Road, Streatham has also been charged with shooting the little girl and bystander Mr Selvakumar. He will next appear at the Old Bailey on June 10.
Meanwhile a 17-year-old boy was held on Sunday and remains in custody, while on Friday a 14-year-old was bailed to a later date.
Last week, Thusha's mother urged people to help the police and save another family from suffering.
Sharmila Kamaleswaran said what had happened to her daughter had left her "feeling empty inside".
Relatives are maintaining vigils at Thusha's hospital bedside while detectives build up a "continuity trail" of the attackers' movements before the incident at the Stockwell Food and Wine store.
Police said both victims remained in a "serious but stable" condition.
Thusha was hit in the chest and Mr Selvakumar suffered a head wound as two youths cowered in the shop after being chased by three other youths on bicycles. Thusha's mother, 12-year-old brother and three-year-old sister were also in the shop during the shooting but were unhurt.