London: New Zealand opening batsman Martin Guptill and South Africa fast bowler Dale Steyn have become the latest international stars to sign up for the new Euro T20 Slam that starts in August, organisers announced yesterday.

Guptill will join his former captain Brendon McCullum, England one-day skipper Eoin Morgan, Pakistan's Shahid Afridi, Australia's Shane Watson and Afghanistan leg-spinner Rashid Khan as an "icon player".