Former England defender Matthew Upson has agreed to join Leicester on a one-year contract after rejecting a new deal with Brighton.
The 35-year-old played 47 games this season for Brighton, winning the club's player of the year award and helping them reach the play-offs, where they were beaten by Derby.
Upson started his career at Luton and also played for Arsenal, Birmingham, West Ham and Stoke, before joining Brighton last summer after an initial loan spell.
He won 22 international caps for England and played at the 2010 World Cup.
The centre-half, who will officially join the Championship winners on July 1, told Brighton's website that the chance to play Premier League football was too good to turn down.
"I would have happily stayed at Brighton for longer but having played the majority of my career in the top flight, I just couldn't pass up the opportunity test myself against the best in the country again," he said.
"At my age I have to think about how many more chances I will get to play in the Premier League, but I never gave up. I am excited to join Leicester and am looking forward to the next chapter of my career.
"What I was really hoping for ever since I joined the Albion was to get to the Premier League with them but unfortunately we fell short on both occasions - but I will take a lot of positives with me from my time at Brighton and I want to thank the club for giving me a chance to play first-team football again last year.
"I hope that I haven't made my last appearance at the Amex as I will be hoping to see Albion hit the Premier League soon. The club has world-class infrastructure with the stadium and the new training ground around the corner, and the players there are as hungry as anyone to take the club up.
"With a few additions to the squad and the right manager in place, then there is no reason next season cannot be the one and I will be keeping an eye on the results."
Upson is the second new signing to be announced by Leicester in the last 24 hours following the arrival of Charlton goalkeeper Ben Hamer, who has agreed a four-year deal with the club.