Glamorgan have signed Australia all-rounder Mitchell Marsh as their extra overseas player for most of the T20 Blast campaign.
Marsh, 27, is expected to be available at the end of July after an Australia 'A' fixture.
He joins his brother Shaun, who is due back after the World Cup.
"He comes with a huge reputation and we've been looking to get him for a while," said director of cricket Mark Wallace.
"I'm sure his brother will have told him plenty of good stuff about playing for Glamorgan."
Mitchell Marsh has played in 31 Tests and 11 T20 internationals, as well as 53 one-day international appearances.
"We were looking for a dual-threat player, someone who can bowl and bat in different positions," Wallace told BBC Sport Wales.
"He bowls very good seamers and is a clean striker of the ball, he could bat high in the order or a bit lower down and give us some impetus in the middle."
Marsh will miss the start of the tournament with Glamorgan as he has been selected for an Australia A tour of England in the build-up to this summer's Ashes.
The tour overlaps with the Welsh county's first four fixtures in the T20 Blast, with an Australia versus Australia A fixture in Southampton between 23 and 26 July clashing with ties at Surrey on 25 July and a home game against Middlesex a day later.
Current overseas player Marnus Labuschagne may not be available to cover until Marsh's arrival as he too is likely to be involved in the Ashes trial match, having played Australia's last three Tests.
Shaun Marsh, who is due to start his second year as Glamorgan's all-format overseas player upon the conclusion of the World Cup, may also be selected for the match although both he and Mitchell were dropped for Australia's most recent Test series against Sri Lanka.
"Shaun has told me a lot about the club," said Mitchell Marsh.
"There's a lot of talent at the club and they've done well over the last few years in the competition so we'll be looking to reach the knockout stages again and hopefully claim some silverware."
Glamorgan begin their T20 campaign against Somerset in Cardiff on 18 July before travelling to face Gloucestershire in Cheltenham the following day.