The O.C.'s Luke Ward is engaged!

Actor Chris Carmack proposed to longtime girlfriend Erin Slaver on Tuesday, and the bride-to-be announced the news with an adorable photo on Instagram.

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"Sparkling drinks and fingers," Erin captioned a pic of the duo celebrating with champagne.

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Sparkling drinks and fingers 💍❤️ (photo cred: @lilycostner )

A post shared by Erin (@erinslaver) on

Chris, 35, is best known for his role as Luke on the hit series The O.C., but currently plays country singer Will Lexington on the ABC drama Nashville.

Congrats to the happy couple!