Ayr manager Scott Brown will take on his former side (Image: Steve Welsh/PA)
Ayr United will take on Scottish Premiership champions Celtic at Somerset Park this summer.
The Glasgow side will send a team to Ayrshire on July 5 to mark the opening of The Honest Men's new North Stand.
Celtic and Ayr United will face of in South Ayrshire for the first time in 25 years. The sides last met in a Scottish Cup quarter final at Hampden Park in 2002.
A club spokesperson said: "It's sure to be a match you don't want to miss! Tickets on sale soon."
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