The left-handed opener will be available for the club's County Championship and Metro Bank One-Day Cup campaigns through to September. He is due to arrive in the UK ahead of Lancashire's opening Championship fixture against Middlesex at Lord's, which begins on April 4.

Acquiring someone of Harris' standing brings vital experience to Emirates Old Trafford, which head coach Dale Benkenstein cited as vital for an immediate return to Division One after the county were relegated in 2024. Lancashire were keen to bring back New Zealand star Daryl Mitchell, who impressed with bat and ball during a stint in 2023, only for the allrounder to secure a lucrative Platinum deal with PSL franchise Lahore Qalandars.

Harris has 12 Test caps for Australia, three of which came in the 2019 Ashes when the tourists secured the urn in Manchester. He came close to a recall for the home Test series against Australia, only for selectors to opt for Nathan McSweeney and then Sam Konstas.

The 32-year-old has been a consistent performer domestically, and currently boasts 445 runs at an average of 49.44 for Victoria in this season's Sheffield Shield. He is also well-versed in county cricket following spells at Leicestershire (2021 and 2024) and Gloucestershire (2022 and 2023), averaging 48.39 from 29 first-class appearances across both teams, with nine centuries.

"I am really excited by the opportunity to join Lancashire for the English summer and will give my all to help this great Club win promotion back to Division One of the County Championship," Harris said, via a statement from Lancashire on Thursday.

"Emirates Old Trafford holds some special memories for me after we retained the Ashes there back in 2019 and I know that Nathan Lyon and Chris Green have both spoken so highly about their time at the club.

"I have really enjoyed my time playing county cricket in England over the last few years and to start a new challenge with Lancashire is something which I am really looking forward to getting stuck into."

Director of Cricket Performance Mark Chilton said: "Marcus is an experienced operator with international pedigree and has a proven track record of scoring runs at the top of the order in domestic cricket in Australia and England.

"He has a strong record in England, following a number of games with both Leicestershire and Gloucestershire in recent years. We are looking forward to working with Marcus and believe that he will play a key role as we look to earn promotion back into Division One at the first time of asking.

"It was important to us that we got somebody on board who was going to be available for the majority of the County Championship this summer with the appropriate pedigree, and Marcus ticks that box, while he will also add valuable experience to our side in the One-Day Cup during August."

West Indies quick Anderson Phillip is the club's other overseas signing, and is available through to July for the first 11 Championship matches.