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.

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!