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Kaitlyn Bristowe, Shawn Booth, The Bachelorette

ABC/Rick Rowell

Bachelor Nation is very excited for Kaitlyn Bristowe and Shawn Booth, obviously. The Bachelorette stars got engaged in the season finale and former Bachelor and Bachelorette contestants started pouring in the congratulations on, where else? Social media.

Britt Nillson, who was in competition with Kaitlyn to be The Bachelorette this season, shared her congratulations on Instagram. "Congratulations to you, sweet @kaitlynbristowe!!! I'm praying for every blessing in the world to come into your new life! Everything DOES happen for a reason, and tonight is definitely your night, girl! Can't wait to see you and give you a big hug! You are a treasure and a fighter and a woman I am happy to call my friend, truly beautiful inside and out—congratulations," she wrote with a photo collage of the two of them.

Andi Dorfman, the star of Bachelorette season 10 tweeted during the finale, asking the obvious. "Fun Finale! Now when do they announce that @chrisbharrison is the next Bachelor?" Can you imagine? Andi even addressed her ex, Nick Viall. "As much as I don't care for Nick, I don't wish a broken heart on anyone," she said. "If I were Nick I would have swallowed that 80k ring and said oops I lost it..."

And the congratulatory messages poured in throughout the night. "Very happy for @KaitlynBristowe and @Shawn_Booth! Wishing them a lifetime of love and happiness," Ali Fedotowsky said.

Catherine Lowe, who married Sean Lowe after their time on The Bachelor and is one of the few couples from the franchise still standing, sent a cheeky tweet. "Sean/Shawn. Always a good choice," she said.

Check out more reactions!

Stay tuned to E! News for more Bachelorette scoop.