Goalkeeper Tim Krul says returning to the Premier League with Luton was too good a chance to turn down after ending a five-year stay at Norwich City.
The Dutch international twice won promotion to the top flight with the Canaries, in 2019 and 2021.
He made 169 appearances for the club, but found himself second-choice behind Angus Gunn for much of last season.
"It's been an amazing rollercoaster," Krul told BBC Radio Norfolk's The Scrimmage podcast.
"I'm lucky, I was at Newcastle for a long time, and then to have a club like Norwich - I could not have dreamt of a better five years, the memories, the success we've had.