You can watch the FA Cup final live on BBC One and the BBC Sport website, with coverage starting at 16:15 BST on Saturday. Kick-off is at 17:15 BST.
This is Chelsea's 15th final, while the Foxes are in their fifth - but will this be the first one they win?
BBC football expert Mark Lawrenson has pitted his wits against a different guest in every round of this season's FA Cup.
For the final, he is up against Radio 1Xtra DJ Ace, who supports FA Cup holders Arsenal.
You can listen to Ace every day from Monday to Friday on the mid-morning show from 10:00-12:45 BST on BBC Radio 1Xtra.