Louise Serio
- Horse(s): Castle Rock and Rock Star
- Location: Kennett Square, PA
- Trainer: Louise Serio
- Farm name: Derbydown Inc.
- When started riding: Very, very young
- Most influential coaches: Mary Warner Brown (mother)
- Career highlights: Two-time World Champion Hunter Rider; two-time team member World Cup Las Vegas; winner of inagural Legacy Cup; winner of the 2010 Derby Wellington
- What makes a horse a "Derby" horse: Castle Rock has lots of quality; Rock Star is very brave and tries to win
- Favorite thing about the Derby: The challenge
- Advice for future Derby hopefuls: Keep trying until you get there; it's awesome
- Other activities: Granddaughter Mary
