London [UK], June 29 (ANI): Chelsea on Saturday announced the signing of youngster Omari Kellyman from Aston Villa on a six-year contract with an option to extend it for another year. Chelsea released an official statement to announce the signing of Kellyman and confirmed that the young attacking midfielder will join his new teammates next month. “Chelsea is pleased to confirm the signing of Omari Kellyman from Aston Villa. The 18-year-old has signed a six-year contract with the Blues, which includes the option of a further year, and will join his new team-mates for pre-season next month,” Che…