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Duff showed off the engagement ring in two side by side photos on Thursday morning. The first image shows Duff smiling into the camera, followed by a black-and-white shot where the newly-engaged couple shared a kiss -- with her left hand in the air.

Koma posted the same photos with the caption \"I asked my best friend to marry me.\"

\"Thanks for the promotion babe,\" Duff responded in the comments with a cute quip.

The \"Younger\" actress was formerly married to former National Hockey League (NHL) star Mike Comrie, with whom she has a son, Luca.

Koma and Duff welcomed their first child together, daughter Banks Violet Bair, last October.

View this post on Instagram

Life changing at its finest... 📷: @mintzplasse

A post shared by Matthew Koma (@matthewkoma) on Apr 20, 2019 at 3:40pm PDT

The pair have not yet announced any further details about the engagement.

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