The 23-year-old centre-back scored six goals in 86 appearances for the Bluebirds and was Hatters manager Rob Edwards' No.1 target this summer.
"For me, Luton Town was the perfect next step," said McGuinness, who spent a decade at Arsenal before joining Cardiff in the summer of 2021.
"I think it's the culture, it's whole the whole of Luton Town.
"It really suits me as a player and as a person. I'm excited to be here already.
"It's early days, but I can sense the vibe and the positivity.
This story is from the August 25, 2024 edition of The Football League Paper.
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This story is from the August 25, 2024 edition of The Football League Paper.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.
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