Labuschagne arrives in Wales on Wednesday, 3 April as cover for Shaun Marsh.

The 24-year-old will play in around eight Championship games, starting against Northamptonshire on 11 April.

Labuschagne will also play in the whole of the club's Royal London One-Day Cup 50-over campaign.

The South African-born batsman broke into the Australian Test team with his debut against Pakistan in October 2018 and is a contender for the Ashes series in England later this summer.

"I've always wanted to play county cricket and test myself in different conditions and a new environment," said Labuschagne.

"I understand it was a difficult season last year for the club, but hopefully I can hit the ground running and put in some good performances to get us off to a winning start."

Marsh is highly likely to feature in the World Cup until July, and will return to Glamorgan then if he is not required for Australia's Ashes series against England.

Labuschagne moved with his family from South Africa to Australia aged 10 and came through the Queensland academy structure, making his first-class debut for the state in 2014.

He has scored four first-class centuries with a career-best of 134 and has taken 28 wickets with his leg-spin, also averaging over 38 in List A (one-day) cricket.

"He's a young exciting player who's played five Tests for Australia and batted number three in their last Test, so he's very much one of their up-and-coming players," said Glamorgan director of cricket Mark Wallace.

"He's a top three or four batsman in both four-day and one-day cricket so he'll give us some stability. But he's also been 'player of the year' in their List A competition so he can play in both gears, and we're lucky to have him."

He is the fourth Queensland player to sign for Glamorgan in two seasons, alongside English-born Charlie Hemphrey and 2018 batsmen Usman Khawaja and Joe Burns.

Opening batsman Nick Selman also came through the Queensland youth system.