It's the highlight of the domestic cricket calendar - and that's just the mascot race!
Around people in fluffy animal costumes sprinting (to a degree) across Edgbaston, there is the Vitality Blast title to be won with Lancashire, Hampshire, Northamptonshire and Somerset the four sides left standing after the group stage and quarter-finals.
Saturday's action in Birmingham starts with the first semi-final between Lancashire and Somerset (11am), followed by the thrills and spills of the Mascot Derby.
Hampshire and Northamptonshire then square off in the second semi-final (2.30pm) before the final takes place in the evening (approximately 6.45pm).
You can watch the entire day live on Sky Sports - build-up begins at 10.30am - and here is why it is a must-not-miss event…
The Mascot Derby