Jamie Lynn Spears, Britney Spears

Todd Williamson / Getty Images; Jean-Paul Aussenard / Getty Images

Britney Spears is excited to see her little sis walk down the aisle!

Jamie Lynn Spears announced her engagement to boyfriend Jamie Watson on Saturday, and on Sunday, Brit took to Twitter to congratulate her.

"So excited and happy for my sister," the former X Factor judge wrote. "congrats ‪@jamielynnspears‬ - love you."

This will be the first marriage for Jamie Lynn, 21. She was previously engaged to Casey Aldridge, the father of her 4-year-old daughter, Maddie, but the couple split in 2010.

Britney, 31, was supposed to say "I do" to Jason Trawick, but the twosome called off their engagement in January. Since then, however, Brit's been out and about with a new guy, David Lucado.

Whether it's David or another lucky guy, we're sure Britney won't have any trouble finding a date to Jamie Lynn and Jamie's wedding!

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