Happy birthday, Jamie Lynn Spears!
The former Nickelodeon star turned 26 on Tuesday, and her big sister, Britney Spears, couldn't help but celebrate!
WATCH: Britney and Jamie Lynn Spears Look Happy at Disney World a Month After Maddie's ATV Accident
Brit Brit took to Twitter to wish her "angel" of a sister a happy birthday, alongside a sweet throwback pic of the two with their brother, Bryan.
"Happy birthday to my baby sister @jamielynnspears