Captain Travis Head and paceman Peter Siddle are among the strong Australian contingent set to feature in the tournament.
Head will represent Worcestershire fresh off Australia’s limited overs campaign against England and the tri-series against Pakistan and Zimbabwe. The 24-year-old scored 291 runs, including two half-centuries, for the Rapids in first-class action earlier this year.
Siddle will resume with Essex after completing his stint with the Montreal Eagles in the inaugural Global T20 Canada series. The former Australian Test seamer has performed strongly in English conditions this season, claiming 20 wickets in just four first-class matches for the county club.
Strikers international signings Rashid Khan and Colin Ingram will also play leading roles in the popular tournament.
Hard-hitting batsman Colin Ingram will captain Glamorgan in the South Division, beginning with a clash against Hampshire on Friday at Southampton.
Ingram was a key factor in Glamorgan’s charge to last year’s T20 Blast semi-finals and was named Player of the Tournament in 2016.
Spin wizard Rashid Khan has already made his county debut for Sussex after reuniting with coach Jason Gillespie.
The top-ranked T20I bowler in the ICC’s player rankings, Rashid helped the Sharks claim victory with 2/25 against Essex at Chelmsford on Wednesday.
The Vitality Blast splits the 18 English county teams into two divisions with 14 matches scheduled in the initial stage of the competition. The top four sides of each group then progress to the knockout games.
The Vitality Blast Finals Day, which is already sold out, is scheduled for 15 September at Edgbaston.
STRIKERS AT THE 2018 VITALITY BLAST
Travis Head - Worcestershire
Peter Siddle - Essex (available after Global T20 Canada competition)
Colin Ingram - Glamorgan
Rashid Khan - Sussex